Error code lookup
Find what your RV error code means
Look up 590 codes from the makers' own manuals and get a plain answer, the likely causes and the checks to do first.
- 590 codesfrom maker manuals
- Brand and modelspecific answers
- Step by stepchecks in order
- Safety stopswhen to call a tech
1What is showing the code?
2Brand and model
3The code or message
Codes mean different things on different brands, so pick your exact model.Where is my model number?
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Short answer
Find the brand and model on the appliance label, then look up the code for that exact model, because the same code means different things on different brands. Most RV codes point to something you can check yourself first: propane supply, 12-volt power, 120-volt power or a blocked vent. Fix the cause, then reset the appliance. If the code keeps coming back, write it down with the model and serial number before you call for service.
RV water heater error codes
Tank water heaters (Suburban, Atwood) mostly use a lockout light. Tankless units (Girard, Furrion, Truma) show numbered codes or flash patterns. Most point to propane supply, water flow or 12-volt power.
Dometic (Atwood) 4, 6 and 10 gallon DSI · Dometic (Atwood) XT 6 and 10 gallon · Furrion (Lippert) 2.4 GPM tankless (FWH09A) · Furrion F2GWH tankless · Girard GSWH-2 tankless · Suburban ST-42 / ST-60 tankless · Suburban SW6D DSI tank · Truma AquaGo
Dometic (Atwood) 4, 6 and 10 gallon DSI error codes
Models: 4, 6 and 10 gallon LP gas water heaters with electronic (DSI) ignition
The light on the remote switch tells you the heater did not light or is in lockout. The manual gives a simple off and on reset.
Where it shows: Indicator light on the remote switch inside the RV
| Code | What it means | Check first |
|---|---|---|
| Switch light on more than 15 seconds | The heater did not light normally after you turned it on. | Turn the remote switch off and wait 5 minutes. |
| Indicator light on (lockout after overheat) | Water got too hot, so the heater locked out. | Let the water cool. |
Source: Dometic (Atwood) LP Gas Water Heater 4-6-10 Gallon Installation, Operation, Maintenance, MPD 93756 (Forest River hosted copy) · Open in the lookup · RV water heater troubleshooting
Dometic (Atwood) XT 6 and 10 gallon error codes
Models: XT 6 and 10 gallon gas/electric tank water heaters (G9EXT, GE9EXT, GEH9EXT, G16EXT, GE16EXT, GEH16EXT)
On gas, the heater tries 3 times to light. If it fails, it locks out and the red lockout lamp comes on.
Where it shows: Red lockout lamp on the inside switch panel
| Code | What it means | Check first |
|---|---|---|
| Lockout lamp on (gas) | The heater tried 3 times to light on propane and did not light, so it locked out. | Check that the propane tank has gas and the valve is open. |
| Lockout lamp on (overheat) | Water got too hot and the ECO high-limit switch locked out the heater. | Let the water cool. |
| No lamp, slow hot water (gas and electric both on) | The gas side may be locked out. The lamp stays off because the electric side is still running. | Turn the electric switch off. |
| No lamp, no heat | The heater has no power to its board. | Check the 2 amp mini ATO fuse on the board. Never use a fuse over 3 amps. |
Source: Dometic (Atwood) Water Heater Model XT 6 and 10 Gallon Operation Manual, MPD 93050 (Forest River hosted copy) · Open in the lookup · RV water heater troubleshooting
Furrion (Lippert) 2.4 GPM tankless (FWH09A) error codes
Models: Furrion 2.4 GPM tankless water heater, models FWH09AFA, FWH09A-AM, FWH09AFA-AM, FWH09AFA-AB
Write the code down first. Lippert says to try a reset: turn the power switch off, wait about 5 seconds, and turn it back on.
Where it shows: Code on the water heater control panel
| Code | What it means | Check first |
|---|---|---|
| E0 | Problem with the water outlet temperature reading. Lippert lists it as a system fault. | Reset: switch off, wait 5 seconds, switch on. |
| E1 | No flame was sensed while the heater tried to light. | Make sure all gas valves are open and the tanks have propane. |
| E2 | The heater saw a fake flame signal. | Turn the heater off. |
| E3 | The mechanical over-temperature sensor tripped. | Let cold water run for 10 to 20 seconds. |
| E4 | Problem with the water inlet temperature reading. Lippert lists it as a system fault. | Reset: switch off, wait 5 seconds, switch on. |
| E5 | Air pressure fault in the exhaust path. | With the heater off, clear anything blocking the exhaust, then restart. |
| E6 | Temperature surge. The outlet temperature jumped out of range. | Flush the toilet less and open fewer cold faucets while using hot water. |
| E7 | The gas solenoid valve has a fault. | Turn the heater off. |
Source: Lippert: RV Water Heater Troubleshooting Guide (Furrion tankless error code table) · Open in the lookup · RV water heater troubleshooting
Furrion F2GWH tankless error codes
Models: F2GWH tankless water heater
The F2GWH uses the same code list as the Girard GSWH-2. When it finds a problem it shuts off and shows a code on the wall panel.
Where it shows: Code on the User Control Panel display inside the RV
| Code | What it means | Check first |
|---|---|---|
| E0 | The outlet water temperature probe has failed. The control sees an open or short circuit. | Turn the heater off at the wall panel and back on. |
| E1 | The burner did not light, or the flame went out while lighting. After two tries the heater locks out. | Check that the propane tank has gas and its valve is open. |
| E2 | The flame went out while the heater was running. A buzzer sounds and the heater locks out. | Check that the propane tank has gas and its valve is open. |
| E3 | The ECO safety switch opened. This normally means outlet water went above 140°F (60°C). | Turn off the hot water and let the heater cool. |
| E4 | The inlet water temperature probe has failed. The control sees an open or short circuit. | Turn the heater off at the wall panel and back on. |
| E5 | The blower motor failed. No motor signal was seen before or during burning. | Turn the heater off and back on once. |
| E6 | Over temperature. Outlet water stayed above 140°F (60°C) for 3 seconds. | Turn off the hot water and let the heater cool. |
| E7 | The linear (gas) valve failed. The control found an open circuit in the valve circuit. | Turn the heater off and back on once. |
| E8 | The air pressure switch did not see airflow. It was missing for 7 seconds before lighting, or lost for 2 seconds while running. | With the heater off and cool, look at the outside vent for nests, bugs, snow, or debris. |
| E9 | Flame was sensed before lighting. A buzzer sounds. This shows when the flame sensor has a short. | Turn the heater off. |
| En | Safety timer. The heater ran longer than 20 minutes and shut itself off. | Close all hot water faucets and look for leaks. |
| Fd | Freeze protection mode. The heater runs for a few seconds and shuts off on its own. This is not a fault. | No fix needed. This is normal in freezing weather. |
Source: Furrion Tankless Water Heater Model F2GWH User Manual, CCD-0005833 (Forest River hosted copy) · Open in the lookup · RV water heater troubleshooting
Girard GSWH-2 tankless error codes
Models: GSWH-2 tankless water heater
When the heater finds a problem it shuts off and shows a code on the wall panel. For lockout codes, turning the hot water faucet off and back on resets it.
Where it shows: Code on the User Control Panel display inside the RV
| Code | What it means | Check first |
|---|---|---|
| E0 | The outlet water temperature probe has failed. The control sees an open or short circuit. | Turn the heater off at the wall panel and back on. |
| E1 | The burner did not light, or the flame went out while lighting. After two tries the heater locks out. | Check that the propane tank has gas and its valve is open. |
| E2 | The flame went out while the heater was running. A buzzer sounds and the heater locks out. | Check that the propane tank has gas and its valve is open. |
| E3 | The ECO safety switch opened. This normally means outlet water went above 140°F (60°C). | Turn off the hot water and let the heater cool. |
| E4 | The inlet water temperature probe has failed. The control sees an open or short circuit. | Turn the heater off at the wall panel and back on. |
| E5 | The blower motor failed. No motor signal was seen before or during burning. | Turn the heater off and back on once. |
| E6 | Over temperature. Outlet water stayed above 140°F (60°C) for 3 seconds. | Turn off the hot water and let the heater cool. |
| E7 | The linear (gas) valve failed. The control found an open circuit in the valve circuit. | Turn the heater off and back on once. |
| E8 | The air pressure switch did not see airflow. It was missing for 7 seconds before lighting, or lost for 2 seconds while running. | With the heater off and cool, look at the outside vent for nests, bugs, snow, or debris. |
| E9 | Flame was sensed before lighting. A buzzer sounds. This shows when the flame sensor has a short. | Turn the heater off. |
| En | Safety timer. The heater ran longer than 20 minutes and shut itself off. | Close all hot water faucets and look for leaks. |
| Fd | Freeze protection mode. The heater runs for a few seconds and shuts off on its own. This is not a fault. | No fix needed. This is normal in freezing weather. |
Source: Girard Water Heater Model GSWH-2 Owner's Manual (Forest River hosted copy) · Open in the lookup · RV water heater troubleshooting
Suburban ST-42 / ST-60 tankless error codes
Models: ST-42 and ST-60 on-demand (tankless) water heaters
The Suburban manual for these models describes two lockouts but gives no list of E codes. Reset by turning the faucet off or pressing OFF on the panel, then ON.
Where it shows: Heater goes into lockout. The official manual does not list display codes
| Code | What it means | Check first |
|---|---|---|
| Lockout (no ignition) | The burner failed to light 3 times, so the heater stopped trying. | Open a hot faucet fully. The heater needs at least 0.7 GPM. |
| Lockout after 20 minutes | The heater ran more than 20 minutes and shut off to save propane. | Turn the faucet off and back on, or press OFF then ON on the panel. |
Source: Suburban Installation, Operation and Maintenance Manual, On Demand Water Heater, Models ST-42, ST-60 (Forest River hosted copy) · Open in the lookup · RV water heater troubleshooting
Suburban SW6D DSI tank error codes
Models: SW6D, SW6DE, SW6DM, SW6DEM direct spark ignition tank water heaters
These heaters do not show error codes. If the burner does not light, it tries two more times and then locks out.
Where it shows: No code display. The burner stops trying after 3 tries (lockout), or the ECO reset button trips
| Code | What it means | Check first |
|---|---|---|
| Lockout (no flame) | The burner did not light after 3 tries, so the heater stopped trying. | Check that the switch is on and the propane tank has gas. |
| ECO reset tripped | Water went above 180°F, so the high-limit tripped and shut down the burner (and the electric element on E models). | Wait until the water is below 110°F. |
Source: Suburban Installation and Operation Manual, Direct Vent Gas Water Heater, Models SW6D, SW6DE, SW6DM, SW6DEM (Oliver Travel Trailers hosted copy) · Open in the lookup · RV water heater troubleshooting
Truma AquaGo error codes
Models: AquaGo instant water heater (AquaGo basic, comfort, comfort plus)
When the yellow status LED flashes twice after a break, there is a fault. Count the short and long blinks of the red LED on the heater. The pattern repeats every 3 seconds.
Where it shows: Blink pattern of the red error LED (LED 2) on the heater, behind the outside door
| Code | What it means | Check first |
|---|---|---|
| 1 (7 short, 1 long) | No flame was detected after gas release and ignition. It shows only after 3 tries about 30 seconds apart. | Check that the propane tank has gas and its valve is open. |
| 2 (6 short, 1 long, 1 short) | The exhaust or burner over-temperature switch (EOS or BOS) is open or unplugged. | Reset: switch the heater off, wait 5 seconds, switch it on. |
| 3 (6 short, 2 long) | The exhaust pressure switch (EPS) did not act right. Either the fan could not push enough air, or the switch closed with the fan off. | With the heater off, look at the exhaust vent and clear any blockage. |
| 4 (5 short, 1 long, 2 short) | The water over-temperature switch (WOS) opened because water went above 185°F (85°C). | Let the heater cool down. |
| 5 (5 short, 1 long, 1 short, 1 long) | A flame was seen at the wrong time: before ignition, before gas release, or after the gas was shut off. | Reset: switch the heater off, wait 5 seconds, switch it on. |
| 6 (5 short, 2 long, 1 short) | Heat was requested but gas cannot be released, because one of the safety switches (WOS, EOS, BOS, EPS) is open or unplugged. | Reset: switch the heater off, wait 5 seconds, switch it on. |
| 7 (5 short, 3 long) | The burner control board found an internal memory error. | Reset: switch the heater off, wait 5 seconds, switch it on. |
| 9 (4 short, 1 long, 2 short, 1 long) | The water outlet temperature sensor (WOT) has a short circuit or is open or unplugged. | Reset: switch the heater off, wait 5 seconds, switch it on. |
| 10 (4 short, 1 long, 1 short, 1 long, 1 short) | Heat was requested but gas was not released, because a valve signal was not turned on. | Reset: switch the heater off, wait 5 seconds, switch it on. |
| 11 (4 short, 1 long, 1 short, 2 long) | Heat was requested but the control's watchdog did not release the gas path. | Reset: switch the heater off, wait 5 seconds, switch it on. |
| 12 (4 short, 2 long, 2 short) | Internal error. | Reset: switch the heater off, wait 5 seconds, switch it on. |
| 13 (4 short, 2 long, 1 short, 1 long) | The gas shut-off valve has a short circuit. The control saw more than 1000 mA and shut it off. | Reset: switch the heater off, wait 5 seconds, switch it on. |
| 16 (3 short, 1 long, 4 short) | The control unit has an internal error. | Reset: switch the heater off, wait 5 seconds, switch it on. |
| 20 (3 short, 1 long, 1 short, 1 long, 2 short) | The water inlet temperature sensor (WIT) is shorted, open, unplugged, or colder than 14°F (-10°C). | If it is below freezing, protect the heater from freezing before you use it. |
| 21 (3 short, 1 long, 1 short, 1 long, 1 short, 1 long) | The circulation line temperature sensor (WCT) is shorted, open, unplugged, or colder than 14°F (-10°C). | If it is below freezing, protect the heater from freezing before you use it. |
| 22 (3 short, 1 long, 1 short, 2 long, 1 short) | The modulation part of the gas valve has a short circuit or is open or unplugged. | Reset: switch the heater off, wait 5 seconds, switch it on. |
| 23 (3 short, 1 long, 1 short, 3 long) | Supply voltage is too high. The heater measured more than 16.4 volts. | Check the RV's 12V voltage. |
| 24 (3 short, 2 long, 3 short) | Supply voltage is too low. The heater measured less than 10 volts. | Charge the battery. |
| 25 (3 short, 2 long, 2 short, 1 long) | The flue fan is drawing current outside its normal limits. | Reset: switch the heater off, wait 5 seconds, switch it on. |
| 26 (3 short, 2 long, 1 short, 1 long, 1 short) | The circulation pump is drawing current outside its normal limits. | Reset: switch the heater off, wait 5 seconds, switch it on. |
| 27 (3 short, 2 long, 1 short, 2 long) | The circulation pump is running dry and makes no water flow. It retries 20 times, every 30 seconds. | Make sure the fresh tank has water or city water is on. |
| 28 (3 short, 3 long, 2 short) | Gas pressure is too low. The RV's gas supply to the heater is not enough. | Check the propane level and that the tank valve is open. |
| 29 (3 short, 3 long, 1 short, 1 long) | You are asking for more hot water than the heater can make. | Turn down the hot water flow. |
| 30 (3 short, 4 long, 1 short) | Risk of freezing. The temperature inside the heater is below about 37°F (3°C). | Protect the heater from freezing, or drain it if the RV will sit in the cold. |
| 31 (3 short, 5 long) | Decalcification (descaling) is finished. This is not a fault. | Rinse the water system as the manual says. |
| 32 (2 short, 1 long, 4 short) | Current in the electric antifreeze kit is too low, for example a broken cable. | Reset: switch the heater off, wait 5 seconds, switch it on. |
| 33 (2 short, 1 long, 4 short, 1 long) | Current in the electric antifreeze kit is too high, for example a short circuit. | Reset: switch the heater off, wait 5 seconds, switch it on. |
Source: Truma AquaGo basic, comfort, comfort plus Operating Instructions, Appendix A: Error Codes (Forest River hosted copy) · Open in the lookup · RV water heater troubleshooting
RV fridge error codes
Absorption fridges (Norcold, Dometic) show short codes like "no FL" when the burner, heater or power source fails. 12-volt compressor fridges use E codes for voltage, door and compressor faults.
Dometic Americana DM2652 / DM2852 · Dometic DM2672 / DMA series · Dometic DMR / DMC 7-series · Dometic RM1350 · Furrion Arctic FCR10DCGFA 12V · Furrion Arctic FCR08 / FCR10DCGTA 12V · Norcold 1200 series (manual 621823J) · Norcold 1200 series (manual 628937) · Norcold 1210 / 1211 · Norcold Polar Max 2117 · Norcold 2118 · Norcold N1095 · Norcold N15DC / N20DC 12V · Norcold N2000 series 12V · Norcold N410 / N412 / N510 / N512 · Norcold N611V / N811V · Norcold N611 / N811 (ON and GAS lights) · Norcold N62X / N82X · Norcold N64X / N84X (incl. N841) · Norcold Polar N7LX / N8LX · Norcold Polar N7V / N8V · Norcold Polar N7X / N8X
Dometic Americana DM2652 / DM2852 error codes
Models: Americana absorption fridges DM2652, DM2852, DM2662, DM2862 and DM2663
These fridges have no error code display. A lit CHECK lamp means the fridge tried to light the burner in gas mode and failed.
Where it shows: CHECK indicator lamp on the front control panel
| Code | What it means | Check first |
|---|---|---|
| CHECK lamp on | The controls tried to light the propane burner for about 45 seconds and failed. The lamp only relates to gas mode. | Make sure the propane tank has gas and all manual gas valves are open |
Source: Dometic Americana DM2652/DM2852/DM2662/DM2862/DM2663 Operating Instructions (Form 3316568.000) · Open in the lookup · RV fridge troubleshooting
Dometic DM2672 / DMA series error codes
Models: DM and DMA absorption fridges DM2672, DM2682, DM2683, DM2872, DM2882, DMA4061, DMA4064, DMA4067, DMA4068, DMA4081, DMA4084, DMA4087
On these newer Dometic fridges a flashing CHECK lamp with a beep means the burner did not light. It stays on until you restart the fridge, even if AC power comes back.
Where it shows: CHECK indicator lamp flashing, with a beeping buzzer
| Code | What it means | Check first |
|---|---|---|
| CHECK lamp flashing, buzzer beeping | The burner failed to light on propane. | Check that all manual gas valves are on and the tank has propane |
Source: Dometic DM and DMA Refrigerators Operating Manual (Form 3317001.000) · Open in the lookup · RV fridge troubleshooting
Dometic DMR / DMC 7-series error codes
Models: DMR and DMC 7-series absorption fridges (for example DMC702)
A gas warning shows as LP flashing with the temperature. Error codes show as which of the 3 temperature LEDs flash, counted from left to right.
Where it shows: LP warning on the display, and error codes shown as a pattern of 3 flashing temperature setting LEDs
| Code | What it means | Check first |
|---|---|---|
| LP (flashing) | Gas ignition failed. The flame did not light within 45 seconds. | Turn the fridge off and back on |
| LED 1 flashing (left) | The gas valve is disconnected, or there is a hardware fault in the gas system. | Turn the fridge off and back on |
| LEDs 1 and 2 flashing | The overheating thermostat is disconnected, or the cooling unit has overheated. | Turn the fridge off |
| LED 2 flashing (middle) | The temperature sensor or its circuit has failed. | Make sure the sensor wire is connected |
| LED 3 flashing (right) | The 12 volt DC voltage is out of range, below or above about 8 to 18 volts. | Charge the house battery or plug into shore power |
| All 3 LEDs flashing | There is no communication between the display and the power module. | Turn the fridge off and back on |
Source: Dometic DMR/DMC 7-Series Installation and Operating Instructions · Open in the lookup · RV fridge troubleshooting
Dometic RM1350 error codes
Models: RM1350 and RM1350SL absorption fridges (LED display)
The LED display switches between the temperature and a message like LP or an E code. After fixing the problem, turn the fridge off and back on.
Where it shows: Message or E code that flashes, switching back and forth with the fridge temperature on the LED display
| Code | What it means | Check first |
|---|---|---|
| LP (flashing) | LP gas ignition failed. The fridge went through a full ignition try and the burner did not light. | Check the propane tank and replace or refill it if empty |
| LP dot flashes slowly (AUTO dot lit) | This is not a fault. Gas operation is on hold for 15 minutes after the vehicle ignition is turned off, for safe refueling. | Wait 15 minutes and gas operation starts again on its own |
| 60 | The fresh food compartment temperature is above the range the display can measure. | Give a newly started fridge time to cool down |
| E0 | There is no communication between the display and the power module. | Turn the fridge off and back on |
| E1 | The LP gas valve is disconnected, or there is a hardware fault in the gas system. The fridge may still work on 120 volt AC. | Run the fridge on 120 volt AC for now |
| E2 | The temperature sensor or its circuit has failed. | Make sure the sensor wire is connected |
| E3 | The cooling unit has malfunctioned. | Turn the fridge off |
| E4 | The 12 volt DC voltage is out of range, below or above about 8 to 18 volts. | Charge the house battery or plug into shore power |
Source: Dometic RM1350 and RM1350SL Operating Instructions (Form 3313352.019) · Open in the lookup · RV fridge troubleshooting
Furrion Arctic FCR10DCGFA 12V error codes
Models: Furrion Arctic 10 cu. ft. 12 volt bottom freezer French door fridge, FCR10DCGFA-SG and FCR10DCGFA-BG
This 12 volt fridge shows an E code on its display. Check battery voltage first, since low or high voltage causes several faults.
Where it shows: E code on the display panel, some with a beeping alarm
| Code | What it means | Check first |
|---|---|---|
| E0 | A fridge door has been open for more than 5 minutes. It beeps. | Close the door fully |
| E1 with UV ALM icon | Low voltage alarm. It beeps. | Check the battery voltage |
| E1 with OV ALM icon | Over-voltage alarm. It beeps. | Wait 5 minutes to see if the error clears and the voltage drops back to normal |
| E2 | The fridge temperature sensor has failed. | Turn the fridge off and back on to see if it clears |
| E3 | The freezer temperature sensor has failed. | Turn the fridge off and back on to see if it clears |
| E4 | The frost (defrost) sensor has failed. | Turn the fridge off and back on to see if it clears |
| E5 | The compressor failed to start. | Turn the fridge off and back on to see if it clears |
| E6 | The outside air (ambient) temperature sensor has failed. | Turn the fridge off and back on to see if it clears |
| EC | Communication failure inside the fridge controls. It beeps. | Turn the fridge off and back on to see if it clears |
| EF | A fan has failed. | Turn the fridge off and back on to see if it clears |
Source: Furrion Arctic 10 cu. ft. BTM Freezer French Door Troubleshooting and Service Manual (CCD-0011045) · Open in the lookup · RV fridge troubleshooting
Furrion Arctic FCR08 / FCR10DCGTA 12V error codes
Models: Furrion Arctic 8 and 10 cu. ft. 12 volt built-in fridges, FCR08DCGTA and FCR10DCGTA
These fridges have no code display. A tech connects a test LED behind the back cover and counts the flashes. First try the hard reset with all power sources off.
Where it shows: Number of flashes on a test LED that a technician connects to the compressor inverter board
| Code | What it means | Check first |
|---|---|---|
| 1 flash | Voltage fault. The input voltage is outside normal limits. | Connect shore power |
| 2 flashes | Fan fault. The fan is drawing too much current. | Contact Lippert customer service or a technician |
| 3 flashes | Compressor start fault. The compressor is blocked or system pressure is too high. | Contact Lippert customer service or a technician |
| 4 flashes | Minimum motor speed error. The compressor cannot hold its lowest speed because of a heavy load. | Contact Lippert customer service or a technician |
| 5 flashes | Thermal fault. The system shut down from high temperature. | Let the fridge and the area around it cool down |
| 6 flashes | Controller hardware fault. The controller found abnormal readings. | Contact Lippert customer service or a technician |
Source: Furrion Arctic 8 and 10 cu. ft. Refrigerator Troubleshooting and Service Manual (CCD-0008122) · Open in the lookup · RV fridge troubleshooting
Norcold 1200 series (manual 621823J) error codes
Models: 1200 series 12 cu. ft. 4-door 2-way fridges, 1200XX and 120X-IMXX models (owner's manual 621823J)
This is the code list from 1200 series manual 621823J. It adds "AC LO" and "no co" codes that the 628937A manual does not list.
Where it shows: Two-part code in the center display, often with a beeping alarm
| Code | What it means | Check first |
|---|---|---|
| No display | The control panel gets no 12 volt DC power, or the fridge is turned off. | Press the power button to make sure the fridge is on |
| dr | A door was left open for more than 2 minutes. | Close the door firmly |
| no FL | The propane burner did not light, or it lit and then went out. | Check that the propane tank valve is open and the tank has gas |
| no AC | The fridge is not getting 120 volt AC power. | Check that the RV is plugged in or the generator is running |
| AC LO | The 120 volt AC power to the control panel is too low. | Check that the AC voltage to the fridge is correct |
| dc LO | The 12 volt DC power to the control panel is too low. | Charge the house battery or plug the RV into shore power |
| no co | The cooling unit has stopped cooling. | First time: check that the outside fridge vents are not blocked |
| Temperature number flashes when SET TEMP is pushed | The temperature sensor has failed, so the fridge is running on its backup control system. | The fridge keeps cooling, so keep food in it for now |
| AC rE | There is a fault inside the fridge controls. | Write down the exact code, model and serial number |
| AC HE | There is a fault inside the fridge controls. | Write down the exact code, model and serial number |
| Sr | There is a fault inside the fridge controls. | Write down the exact code, model and serial number |
Source: Norcold 1200 Series Owner's Manual (621823J) · Open in the lookup · RV fridge troubleshooting
Norcold 1200 series (manual 628937) error codes
Models: 1200 series 12 cu. ft. 4-door 2-way fridges, 1200XX and 120X-IMXX models (owner's manual 628937A)
Check your manual number, since Norcold printed more than one code list for the 1200 series. This list is from manual 628937A.
Where it shows: Two-part code in the center display, often with a beeping alarm
| Code | What it means | Check first |
|---|---|---|
| No display | The control panel gets no 12 volt DC power, or the fridge is turned off. | Press the power button to make sure the fridge is on |
| dr | A door was left open for more than 2 minutes. | Close the door firmly |
| no FL | The propane burner did not light, or it lit and then went out. | Check that the propane tank valve is open and the tank has gas |
| no AC | The fridge is not getting 120 volt AC power. | Check that the RV is plugged in or the generator is running |
| dc LO | The 12 volt DC power to the control panel is too low. | Charge the house battery or plug the RV into shore power |
| LI oP | A high temperature limit switch has opened and stopped the fridge. | Write down the code, model and serial number |
| Temperature number flashes when SET TEMP is pushed | The temperature sensor has failed, so the fridge is running on its backup control system. | The fridge keeps cooling, so keep food in it for now |
| AC rE | There is a fault inside the fridge controls. | Write down the exact code, model and serial number |
| AC HE | There is a fault inside the fridge controls. | Write down the exact code, model and serial number |
| Sr | There is a fault inside the fridge controls. | Write down the exact code, model and serial number |
Source: Norcold 1200 Series Owner's Manual (628937A) · Open in the lookup · RV fridge troubleshooting
Norcold 1210 / 1211 error codes
Models: 121X series absorption fridges (for example 1210 and 1211)
The display flashes two short words one after the other. Gas and power codes are often simple checks, but LI oP needs a technician.
Where it shows: Two-part code in the center display, often with a beeping alarm
| Code | What it means | Check first |
|---|---|---|
| No display | The control panel gets no 12 volt DC power, or the fridge is turned off. | Press the power button to make sure the fridge is on |
| dr | A door was left open for more than 2 minutes. | Close the door firmly |
| no FL | The propane burner did not light, or it lit and then went out. | Check that the propane tank valve is open and the tank has gas |
| no AC | The fridge is not getting 120 volt AC power. | Check that the RV is plugged in or the generator is running |
| dc LO | The 12 volt DC power to the control panel is too low. | Charge the house battery or plug the RV into shore power |
| LI oP | A high temperature limit switch has opened and stopped the fridge. | Write down the code, model and serial number |
| Temperature number flashes when SET TEMP is pushed | The temperature sensor has failed, so the fridge is running on its backup control system. | The fridge keeps cooling, so keep food in it for now |
| AC rE | There is a fault inside the fridge controls. | Write down the exact code, model and serial number |
| AC HE | There is a fault inside the fridge controls. | Write down the exact code, model and serial number |
| Sr | There is a fault inside the fridge controls. | Write down the exact code, model and serial number |
Source: Norcold 121X Series Owner's Manual (635494E) · Open in the lookup · RV fridge troubleshooting
Norcold Polar Max 2117 error codes
Models: 2117X series absorption fridges (Polar Max 2117)
This model shows two-part codes like the other big Norcolds, plus C1 to C5 sensor codes.
Where it shows: Code in the center of the LCD display, often with a beeping alarm
| Code | What it means | Check first |
|---|---|---|
| No display | The control panel gets no 12 volt DC power, or the fridge is turned off. | Press the power button to make sure the fridge is on |
| dr | A door was left open for more than 2 minutes. | Close the door firmly |
| no FL | The propane burner did not light, or it lit and then went out. | Check that the propane tank valve is open and the tank has gas |
| no AC | The fridge is not getting 120 volt AC power. | Check that the RV is plugged in or the generator is running |
| dc LO | The 12 volt DC power to the control panel is too low. | Charge the house battery or plug the RV into shore power |
| FL -- | The fridge senses a flame when there should not be one. | Shut off the propane supply to the fridge |
| LI oP | A high temperature limit switch has opened and stopped the fridge. | Write down the code, model and serial number |
| AC rE | There is a fault inside the fridge controls. | Write down the exact code, model and serial number |
| AC HE | There is a fault inside the fridge controls. | Write down the exact code, model and serial number |
| Sr | There is a fault inside the fridge controls. | Write down the exact code, model and serial number |
| C1 | The fresh food air temperature sensor reads out of range. | Write down the exact code, model and serial number |
| C2 | The freezer fin temperature sensor reads out of range. | Write down the exact code, model and serial number |
| C3 | The freezer air temperature sensor reads out of range. | Write down the exact code, model and serial number |
| C4 | The outside fan temperature sensor reads out of range. | Write down the exact code, model and serial number |
| C5 | The fresh food fin temperature sensor reads out of range. | Write down the exact code, model and serial number |
Source: Norcold 2117X Series Owner's Manual (636691A) · Open in the lookup · RV fridge troubleshooting
Norcold 2118 error codes
Models: 2118X series absorption fridges
The LCD flashes two short words one after the other. The fridge tries to light the burner for 30 seconds before it shows a flame code.
Where it shows: Two-part code on the LCD, often with a beeping alarm
| Code | What it means | Check first |
|---|---|---|
| dr | A door was left open for more than 2 minutes. | Close the door firmly |
| no FL | The propane burner did not light, or it lit and then went out. | Check that the propane tank valve is open and the tank has gas |
| no AC | The fridge is not getting 120 volt AC power. | Check that the RV is plugged in or the generator is running |
| dc LO | The 12 volt DC power to the control panel is too low. | Charge the house battery or plug the RV into shore power |
| Sr | There is a fault inside the fridge controls. | Turn the fridge power off, then back on to reset |
| Temperature setting flashes when TEMP SET or MODE is pushed | The temperature sensor has failed, so the fridge is running on its backup control system. | The fridge keeps cooling, so keep food in it for now |
| AC rE | There is a fault inside the fridge controls. | Write down the exact code, model and serial number |
| AC HE | There is a problem with the AC heater, the part that makes heat for cooling on electric power. | Run the fridge on propane until it is fixed, if it still cools on gas |
| oP LI | A high temperature limit switch has opened and stopped the fridge. | Write down the code, model and serial number |
| FL -- | The fridge senses a flame at the burner when there should not be one. | Turn the fridge off |
Source: Norcold 2118X Series Owner's Manual (636900B) · Open in the lookup · RV fridge troubleshooting
Norcold N1095 error codes
Models: N109X 10 cu. ft. 2-way absorption fridges, with or without ice maker (for example N1095)
The display flashes two short words one after the other. Push and hold ON/OFF for one second to quiet the alarm while you check.
Where it shows: Two-part code in the center display, often with a beeping alarm
| Code | What it means | Check first |
|---|---|---|
| No display | The control panel gets no 12 volt DC power, or the fridge is turned off. | Press the power button to make sure the fridge is on |
| dr | A door was left open for more than 2 minutes. | Close the door firmly |
| no FL | The propane burner did not light, or it lit and then went out. | Check that the propane tank valve is open and the tank has gas |
| no AC | The fridge is not getting 120 volt AC power. | Check that the RV is plugged in or the generator is running |
| dc LO | The 12 volt DC power to the control panel is too low. | Charge the house battery or plug the RV into shore power |
| Temperature number flashes when TEMP SET is pushed | The temperature sensor has failed, so the fridge is running on its backup control system. | The fridge keeps cooling, so keep food in it for now |
| AC rE | There is a fault inside the fridge controls. | Write down the exact code, model and serial number |
| dc rE | There is a fault inside the fridge controls. | Write down the exact code, model and serial number |
| AC HE | There is a fault inside the fridge controls. | Write down the exact code, model and serial number |
| dc HE | There is a fault inside the fridge controls. | Write down the exact code, model and serial number |
| Sr | There is a fault inside the fridge controls. | Write down the exact code, model and serial number |
Source: Norcold N109X Owner's Manual (635491C) · Open in the lookup · RV fridge troubleshooting
Norcold N15DC / N20DC 12V error codes
Models: N15DCX and N20DCX 12 volt DC compressor fridges
When something goes wrong, the display blinks an E code. Power and door codes are things you can check first.
Where it shows: Blinking E code on the display screen
| Code | What it means | Check first |
|---|---|---|
| E1 | The fresh food temperature sensor (thermistor) has an error. | Write down the code, model and serial number |
| E2 | The freezer temperature sensor (thermistor) has an error. | Write down the code, model and serial number |
| E3 | The fridge shut off because the 12 volt power went too low or too high. | Charge the house battery or plug into shore power |
| E4 | A door has been open longer than 2 minutes. | Close the door firmly |
| E5 | The 12 volt supply voltage is too low. | Charge the house battery or plug into shore power |
| E6 | The outside air (ambient) temperature sensor has an error. | Write down the code, model and serial number |
| E7 | The fresh food evaporator fan has an error. | Write down the code, model and serial number |
| E8 | The freezer condenser fan has failed. | Write down the code, model and serial number |
| E9 | The fresh food condenser fan has failed. | Write down the code, model and serial number |
Source: Norcold N15DC and N20DC Owner's Manual (641013E) · Open in the lookup · RV fridge troubleshooting
Norcold N2000 series 12V error codes
Models: N2000 series 12 volt compressor fridges (N2090, N2152, N2175)
Look at the power symbol color and which of the 5 level bars are lit, counting bars from the left (smallest) to the right (tallest).
Where it shows: Power button LED color plus a pattern of lit bars on the 5-bar cooling level display
| Code | What it means | Check first |
|---|---|---|
| Red LED on, bars 2, 3 and 4 lit | The cabinet fan has an error. | Write down the code, model and serial number |
| Orange LED on, bars 2, 3, 4 and 5 lit | The condenser fan has an error. | Write down the code, model and serial number |
| Red LED blinking, bars 1, 4 and 5 lit | The 2-way valve has an error. | Write down the code, model and serial number |
| Red LED blinking, bars 1 and 3 lit | The cabinet temperature sensor (thermistor) has an error. | Write down the code, model and serial number |
| Red LED blinking, bars 1, 3 and 5 lit | The freezer temperature sensor (thermistor) has an error. | Write down the code, model and serial number |
| Red LED blinking, bars 1, 3 and 4 lit | The outside air (ambient) temperature sensor has an error. | Write down the code, model and serial number |
| Red LED blinking, bars 1, 2 and 5 lit | The input voltage is out of range. | Recharge the battery |
| Red LED blinking, bars 1, 2, 4 and 5 lit | The compressor's thermal cut-out has tripped from overheating. | Turn the fridge off for 1 hour |
Source: Norcold N2000 Series User Manual (US, 04/2025) · Open in the lookup · RV fridge troubleshooting
Norcold N410 / N412 / N510 / N512 error codes
Models: N41X and N51X 2-way and 3-way absorption fridges (for example N410, N412, N510, N512)
These compact fridges show a one-letter code. If you see "F" then "A", the fridge has no AC power and also could not light on gas.
Where it shows: One letter in the center of the display
| Code | What it means | Check first |
|---|---|---|
| No display | The control panel gets no 12 volt DC power, or the fridge is turned off. | Press the power button to make sure the fridge is on |
| F | The propane burner did not light, or it lit and then went out. | Check that the propane tank valve is open and the tank has gas |
| A | The fridge is not getting 120 volt AC power. | Check that the RV is plugged in or the generator is running |
| C | The 12 volt DC power to the control panel is too low. | Charge the house battery or plug the RV into shore power |
| n | The cooling unit has stopped cooling. | First time: check that the outside fridge vents are not blocked |
| Temperature setting flashes for ten seconds and mode appears | The temperature sensor has failed, so the fridge is running on its backup control system. | The fridge keeps cooling, so keep food in it for now |
| H | There is a fault inside the fridge controls. | Write down the exact code, model and serial number |
| r | There is a fault inside the fridge controls. | Write down the exact code, model and serial number |
| S | There is a fault inside the fridge controls. | Write down the exact code, model and serial number |
Source: Norcold N41X and N51X Owner's Manual (635480E) · Open in the lookup · RV fridge troubleshooting
Norcold N611V / N811V error codes
Models: N611v and N811v 2-way absorption fridges (single indicator light)
These models have one indicator light. If it is solid red or flashing red, the fridge is not cooling.
Where it shows: Color and flash pattern of the one indicator light on the control panel
| Code | What it means | Check first |
|---|---|---|
| Green light, flashes off once every 20 seconds | The fridge is running on AC power, but the temperature sensor is not working, so a backup system controls the temperature. | Check that the thermistor is plugged in |
| Amber light, flashes off once every 20 seconds | The fridge is running on propane, but the temperature sensor is not working, so a backup system controls the temperature. | Check that the thermistor is plugged in |
| Red light, solid | No AC power was found, so the fridge switched to propane, but the burner did not light (gas lockout). | Check that the fridge is plugged into a working outlet |
| Red light, 2 flashes every 5 seconds | There is a fault inside the fridge controls. | Turn the fridge power off, then back on to reset |
| Red light, 3 flashes every 5 seconds | A temperature limit switch is open. | Write down the code, model and serial number |
| Red light, 4 flashes every 5 seconds | There is a problem with the AC heater relay. | Write down the code, model and serial number |
| Red light, 5 flashes every 5 seconds | A flame is present at the burner when there should be none. | Turn the fridge off |
| Red light, 8 flashes every 5 seconds | The 12 volt DC power to the fridge is too low. | Charge the house battery or plug into shore power |
| Red light, 9 flashes every 5 seconds | The 12 volt DC power is too low to run the fridge on propane. | Charge the house battery or plug into shore power |
Source: Norcold N611v and N811v Installation and Owner's Manual (636158G) · Open in the lookup · RV fridge troubleshooting
Norcold N611 / N811 (ON and GAS lights) error codes
Models: N61X and N81X 2-way absorption fridges (for example N611 and N811) with ON and GAS lights
These fridges use an ON light and a GAS light instead of a display. Count how the lights flash to read the code.
Where it shows: ON light and GAS check light, steady or flashing
| Code | What it means | Check first |
|---|---|---|
| ON light is off | No 12 volt DC power is reaching the control panel, or the fridge is off. | Make sure the fridge is turned on |
| ON and GAS lights both flash about once per second | No energy source is working. AC power is missing (or the fridge is in manual gas mode) and the burner did not light. | In AUTO mode, check the fridge is plugged into a working outlet and the breaker or fuse is good |
| ON light on, GAS light flashes about once per second | The burner did not light (gas lockout), but AC power came back and the fridge is now running on AC. | Check that the propane tank valve is open and the tank has gas |
| ON light flashes off 1 time about every 3 seconds | The temperature sensor failed. The fridge is running on its backup operating system. | Book an RV dealer or Norcold service center |
| ON light flashes off 3 times about every 3 seconds, GAS light on | The AC heater failed. The fridge will run on propane only. | Run on propane until it is fixed |
| ON light flashes off 4 times about every 3 seconds | There is a fault inside the fridge operating controls. | Book an RV dealer or Norcold service center |
Source: Norcold N61X and N81X Owner's Manual (635485D) · Open in the lookup · RV fridge troubleshooting
Norcold N62X / N82X error codes
Models: N62X and N82X 2-way absorption fridges with a center display (single-letter codes)
On these models the fault code is one letter in the center display. Most power and gas codes are things you can check yourself.
Where it shows: One letter in the center of the control panel display
| Code | What it means | Check first |
|---|---|---|
| No display | The control panel gets no 12 volt DC power, or the fridge is turned off. | Press the power button to make sure the fridge is on |
| d | A door was left open for more than 2 minutes. | Close the door firmly |
| F | The propane burner did not light, or it lit and then went out. | Check that the propane tank valve is open and the tank has gas |
| A | The fridge is not getting 120 volt AC power. | Check that the RV is plugged in or the generator is running |
| C | The 12 volt DC power to the control panel is too low. | Charge the house battery or plug the RV into shore power |
| Temperature number flashes when TEMP SET is pushed | The temperature sensor has failed, so the fridge is running on its backup control system. | The fridge keeps cooling, so keep food in it for now |
| H | There is a fault inside the fridge controls. | Write down the exact code, model and serial number |
| r | There is a fault inside the fridge controls. | Write down the exact code, model and serial number |
| S | There is a fault inside the fridge controls. | Write down the exact code, model and serial number |
Source: Norcold N62X, N64X, N82X and N84X Owner's Manual (635488C) · Open in the lookup · RV fridge troubleshooting
Norcold N64X / N84X (incl. N841) error codes
Models: N64X and N84X 2-way and 3-way absorption fridges, including ice maker (IM) models (for example N641 and N841)
The display flashes two short words one after the other, and most codes also beep. Gas and power codes are often simple to fix.
Where it shows: Two-part code in the center display, such as "no" then "FL", often with a beeping alarm
| Code | What it means | Check first |
|---|---|---|
| No display | The control panel gets no 12 volt DC power, or the fridge is turned off. | Press the power button to make sure the fridge is on |
| dr | A door was left open for more than 2 minutes. | Close the door firmly |
| no FL | The propane burner did not light, or it lit and then went out. | Check that the propane tank valve is open and the tank has gas |
| no AC | The fridge is not getting 120 volt AC power. | Check that the RV is plugged in or the generator is running |
| dc LO | The 12 volt DC power to the control panel is too low. | Charge the house battery or plug the RV into shore power |
| Temperature number flashes when TEMP SET is pushed | The temperature sensor has failed, so the fridge is running on its backup control system. | The fridge keeps cooling, so keep food in it for now |
| AC rE | There is a fault inside the fridge controls. | Write down the exact code, model and serial number |
| dc rE | There is a fault inside the fridge controls. | Write down the exact code, model and serial number |
| AC HE | There is a fault inside the fridge controls. | Write down the exact code, model and serial number |
| dc HE | There is a fault inside the fridge controls. | Write down the exact code, model and serial number |
| Sr | There is a fault inside the fridge controls. | Write down the exact code, model and serial number |
Source: Norcold N62X, N64X, N82X and N84X Owner's Manual (635488C) · Open in the lookup · RV fridge troubleshooting
Norcold Polar N7LX / N8LX error codes
Models: Polar N7LX and N8LX absorption fridges (2-way and 3-way)
The display switches between two short words, like "no" and "FL". Gas and power codes are simple checks; heater and control codes need a technician.
Where it shows: Two short words that flash back and forth on the display, usually with a beeping alarm
| Code | What it means | Check first |
|---|---|---|
| no FL | The burner did not light or re-light. | Turn the fridge power off, then back on to reset |
| no AC | AC power is not reaching the fridge. | Turn the fridge power off, then back on to reset |
| AC HE | There is a problem with the AC heater, the part that makes heat for cooling on electric power. | Run the fridge on propane until it is fixed, if it still cools on gas |
| AC rE | There is a fault inside the fridge controls. | Write down the exact code, model and serial number |
| Lo dc | The 12 volt DC input to the fridge is too low. It can show with or without a beep. | Charge the house battery or plug into shore power |
| HI dc | The 12 volt DC input to the fridge is too high. | Turn the fridge power off, then back on to reset |
| no dt | The fridge controls lost communication with each other. | Turn the fridge power off, then back on to reset |
| Sr | There is a fault in the fridge electronic controls. | Turn the fridge power off, then back on to reset |
| oP LI | There is a fault in the fridge electronic controls. | Turn the fridge power off, then back on to reset |
| FL -- | The fridge senses a flame at the burner when there should not be one. | Turn the fridge off |
| Temperature setting flashes on and off every second | The temperature sensor is not working, so a backup system controls the temperature. | Book an RV dealer or Norcold service center |
| Blank display | The fridge is off or will not turn on. | Turn the fridge power on |
Source: Norcold Polar N7 and N8 Series Owner's Manual (639301F) · Open in the lookup · RV fridge troubleshooting
Norcold Polar N7V / N8V error codes
Models: Polar N7V and N8V absorption fridges
Count the red flashes in each 5 second group to get the flash code. The manual's wording for some flash counts is mixed up, so go by the code number.
Where it shows: Power ON indicator color and number of red flashes every 5 seconds
| Code | What it means | Check first |
|---|---|---|
| Power ON indicator solid red | The fridge tried to run on the selected energy source(s) and failed. | Turn the fridge power off, then back on to reset |
| Flash code 1 | There is a problem with the AC heater. | Book an RV dealer or Norcold service center |
| Flash code 2 | There is a fault in the fridge electronic controls. | Turn the fridge power off, then back on to reset |
| Flash code 3 | A flame is present at the burner when there should not be one. | Turn the fridge power off, then back on to reset |
| Flash code 4 | There is a fault in the fridge controls. | Book an RV dealer or Norcold service center |
| Flash code 5 | A flame is sensed at the burner when there should be none. | Turn the fridge off |
| Flash code 8 | The 12 volt DC input to the fridge is too low. | Turn the fridge power off, then back on to reset |
| Flash code 9 | The 12 volt DC input to the fridge is too high. | Turn the fridge power off, then back on to reset |
| Flash code 10 | The fridge controls lost communication with each other. | Book an RV dealer or Norcold service center |
| Green, flashes off once every 20 seconds | The fridge is on AC power, but the temperature sensor is not working, so a backup system controls the temperature. | Book an RV dealer or Norcold service center |
| Amber, flashes off once every 20 seconds | The temperature sensor is not working, so a backup system controls the temperature. | Book an RV dealer or Norcold service center |
| Blank display | The fridge is off or will not turn on. | Turn the fridge power on |
Source: Norcold Polar N7 and N8 Series Owner's Manual (639301F) · Open in the lookup · RV fridge troubleshooting
Norcold Polar N7X / N8X error codes
Models: Polar N7X and N8X absorption fridges (2-way and 3-way)
Count the red flashes in each 5 second group to get the flash code. Some printed flash counts in the manual do not match, so go by the code number.
Where it shows: POWER ON indicator color and number of red flashes every 5 seconds
| Code | What it means | Check first |
|---|---|---|
| POWER ON indicator solid red | The fridge tried to run on the selected energy source(s) and failed. | Turn the fridge power off, then back on to reset |
| Flash code 1 | There is a problem with the AC heater. | Book an RV dealer or Norcold service center |
| Flash code 2 | There is a fault in the fridge electronic controls. | Turn the fridge power off, then back on to reset |
| Flash code 3 | There is a fault in the fridge electronic controls. | Turn the fridge power off, then back on to reset |
| Flash code 4 | There is a fault in the fridge controls. | Book an RV dealer or Norcold service center |
| Flash code 5 | A flame is sensed at the burner when there should be none. | Turn the fridge off |
| Flash code 6 | There is a problem with the DC heater (3-way models only). | Run on AC or propane until it is fixed |
| Flash code 7 | There is a fault in the fridge electronic controls. | Book an RV dealer or Norcold service center |
| Flash code 8 | The 12 volt DC input to the fridge is too low. | Turn the fridge power off, then back on to reset |
| Flash code 9 | The 12 volt DC input to the fridge is too high. | Turn the fridge power off, then back on to reset |
| Flash code 10 | The fridge controls lost communication with each other. | Turn the fridge power off, then back on to reset |
| Snowflake icons flash on and off every second | The temperature sensor is not working, so a backup system controls the temperature. | Book an RV dealer or Norcold service center |
| Blank display | The fridge is off or will not turn on. | Turn the fridge power on |
Source: Norcold Polar N7 and N8 Series Owner's Manual (639301F) · Open in the lookup · RV fridge troubleshooting
RV generator error codes
Cummins Onan generators blink codes on the start switch light. On older controls, 3 blinks means a two-digit code is stored: press STOP once to read it. Inverter models blink the two-digit code directly, and some numbers mean different things.
Cummins Onan QD 10000 / 12500 diesel · Cummins Onan QD 6000 / 7500 / 8000 diesel · Cummins Onan QG 2800 · Cummins Onan QG 2800i inverter · Cummins Onan QG 4000 / MicroQuiet 4000 · Cummins Onan QG 4000i dual fuel · Cummins Onan QG 5500 / 7000 · Cummins Onan QG 7000i dual fuel
Cummins Onan QD 10000 / 12500 diesel error codes
Models: RV QD 10000 and QD 12500 diesel (HDKCA and HDKCB series, Spec F to H)
After a fault shutdown, count the blinks on the status light in the start/stop switch: 1 blink is engine too hot, 2 blinks is low oil pressure, 3 blinks is a service fault and 4 blinks is over crank. For 3 blinks, press STOP/PRIME once and the light blinks a two-digit code, tens first, a short pause, then the ones (code 36 is 3 blinks, pause, 6 blinks), and if the blinking has stopped, press STOP/PRIME 3 times within 5 seconds to see it again.
Where it shows: Blinks of the status light on the start/stop switch
| Code | What it means | Check first |
|---|---|---|
| 1 | The engine coolant got too hot (over 239°F for 10 seconds), so the generator shut down. | Let the generator cool down before you touch anything. |
| 2 | Low oil pressure. The oil pressure switch shut the engine down to protect it. | Park level and check the dipstick. |
| 3 | Service fault. Three blinks means a two-digit code is stored and you need to read it. | Press STOP/PRIME once. The light will now blink the two-digit code. |
| 4 | Over crank. The engine cranked for 30 seconds without starting. | Check the fuel level and fill the tank if it is low. |
| 12 | Over voltage. The control could not hold the output voltage at the right level. | Write down the code plus the model and serial number from the generator nameplate. |
| 13 | Under voltage. The control could not hold the output voltage up, usually because the load is too big. | Turn off some appliances, mainly air conditioners and battery chargers. |
| 14 | Over frequency. The engine governor could not hold the right speed, so the output frequency ran high. | Write down the code plus the model and serial number from the generator nameplate. |
| 15 | Under frequency. The engine governor could not hold the right speed, usually because the load is too big. | Turn off some appliances, mainly air conditioners and battery chargers. |
| 19 | Governor actuator fault. The control found an open or shorted circuit in the part that moves the throttle. | Write down the code plus the model and serial number from the generator nameplate. |
| 22 | Governor actuator overload. The engine has been working near full throttle for too long. | Turn off some appliances, mainly air conditioners and battery chargers. |
| 27 | Voltage sense fault. The control cannot read the generator output voltage. | Write down the code plus the model and serial number from the generator nameplate. |
| 29 | High battery voltage. The generator saw more than 19 volts on its battery. | Check how the batteries that serve the generator are wired. They must be in parallel for 12 volts. |
| 32 | Low cranking speed. The engine turned slower than 180 RPM for more than 2 seconds while cranking. | Clean and tighten the battery cables at the battery and at the generator. |
| 35 | Control card failure. The control found a memory (EEPROM) error during its self test. | Write down the code plus the model and serial number from the generator nameplate. |
| 36 | Engine stopped. The engine quit on its own without a stop command from the control. | Check the fuel level and fill the tank if it is low. |
| 38 | Over current (field overload). The generator was overloaded by loads like motors and compressors. | Turn off some appliances, mainly air conditioners and battery chargers. |
| 41 | Generator rotor fault. The control cannot read the field or output voltage. | Write down the code plus the model and serial number from the generator nameplate. |
| 42 | Processor fault. The control found a memory (ROM) error during its self test. | Write down the code plus the model and serial number from the generator nameplate. |
| 43 | Processor fault. The control found a memory (RAM) error during its self test. | Write down the code plus the model and serial number from the generator nameplate. |
| 45 | Speed sense fault. The control cannot read the engine speed signal. | Write down the code plus the model and serial number from the generator nameplate. |
| 48 | Generator field sense fault. The control cannot read the field voltage. | Write down the code plus the model and serial number from the generator nameplate. |
| 57 | Over prime. The fuel priming ran for more than 3 minutes. | Check both the switch on the generator and the remote switch inside the RV. |
Source: Cummins Onan Operator Manual, Onan Generator Set for RV, HDKCA/HDKCB (Spec F-H), A043D713 Issue 8 · Open in the lookup · RV generator troubleshooting
Cummins Onan QD 6000 / 7500 / 8000 diesel error codes
Models: RV QD 6000, QD 7500 and QD 8000 diesel (HDKAH, HDKAJ, HDKAK series)
After a fault shutdown, count the blinks on the status light in the start/stop switch: 1 blink is engine too hot, 2 blinks is low oil pressure, 3 blinks is a service fault and 4 blinks is over crank. For 3 blinks, press STOP/PRIME once and the light blinks a two-digit code, tens first, a short pause, then the ones (code 36 is 3 blinks, pause, 6 blinks), and if the blinking has stopped, press STOP/PRIME 3 times within 5 seconds to see it again.
Where it shows: Blinks of the status light on the start/stop switch
| Code | What it means | Check first |
|---|---|---|
| 1 | The engine coolant got too hot (over 239°F for 10 seconds), so the generator shut down. | Let the generator cool down before you touch anything. |
| 2 | Low oil pressure. The oil pressure switch shut the engine down to protect it. | Park level and check the dipstick. |
| 3 | Service fault. Three blinks means a two-digit code is stored and you need to read it. | Press STOP/PRIME once. The light will now blink the two-digit code. |
| 4 | Over crank. The engine cranked for 30 seconds without starting. | Check the fuel level and fill the tank if it is low. |
| 12 | Over voltage. The control could not hold the output voltage at the right level. | Write down the code plus the model and serial number from the generator nameplate. |
| 13 | Under voltage. The control could not hold the output voltage up, usually because the load is too big. | Turn off some appliances, mainly air conditioners and battery chargers. |
| 14 | Over frequency. The engine governor could not hold the right speed, so the output frequency ran high. | Write down the code plus the model and serial number from the generator nameplate. |
| 15 | Under frequency. The engine governor could not hold the right speed, usually because the load is too big. | Turn off some appliances, mainly air conditioners and battery chargers. |
| 19 | Governor actuator fault. The control found an open or shorted circuit in the part that moves the throttle. | Write down the code plus the model and serial number from the generator nameplate. |
| 22 | Governor actuator overload. The engine has been working near full throttle for too long. | Turn off some appliances, mainly air conditioners and battery chargers. |
| 27 | Voltage sense fault. The control cannot read the generator output voltage. | Write down the code plus the model and serial number from the generator nameplate. |
| 29 | High battery voltage. The generator saw more than 19 volts on its battery. | Check how the batteries that serve the generator are wired. They must be in parallel for 12 volts. |
| 32 | Low cranking speed. The engine turned slower than 180 RPM for more than 2 seconds while cranking. | Clean and tighten the battery cables at the battery and at the generator. |
| 35 | Control card failure. The control found a memory (EEPROM) error during its self test. | Write down the code plus the model and serial number from the generator nameplate. |
| 36 | Engine stopped. The engine quit on its own without a stop command from the control. | Check the fuel level and fill the tank if it is low. |
| 38 | Over current (field overload). The generator was overloaded by loads like motors and compressors. | Turn off some appliances, mainly air conditioners and battery chargers. |
| 41 | Generator rotor fault. The control cannot read the field or output voltage. | Write down the code plus the model and serial number from the generator nameplate. |
| 42 | Processor fault. The control found a memory (ROM) error during its self test. | Write down the code plus the model and serial number from the generator nameplate. |
| 43 | Processor fault. The control found a memory (RAM) error during its self test. | Write down the code plus the model and serial number from the generator nameplate. |
| 45 | Speed sense fault. The control cannot read the engine speed signal. | Write down the code plus the model and serial number from the generator nameplate. |
| 48 | Generator field sense fault. The control cannot read the field voltage. | Write down the code plus the model and serial number from the generator nameplate. |
| 57 | Over prime. The fuel priming ran for more than 3 minutes. | Check both the switch on the generator and the remote switch inside the RV. |
Source: Cummins Onan Operator Manual, Onan Generator Set for RV, HDKAH/HDKAJ/HDKAK, A046L053 Issue 6 · Open in the lookup · RV generator troubleshooting
Cummins Onan QG 2800 error codes
Models: RV QG 2800 and QG 2800 EVAP gasoline (HGJBB series, Spec A to B)
After a fault shutdown, count the blinks on the status light in the start/stop switch: 2 blinks is low oil pressure, 3 blinks is a service fault and 4 blinks is over crank. For 3 blinks, press STOP/PRIME once and the light blinks a two-digit code, tens first, a short pause, then the ones (code 36 is 3 blinks, pause, 6 blinks), and if the blinking has stopped, press STOP/PRIME 3 times within 5 seconds to see it again.
Where it shows: Blinks of the status light on the start/stop switch
| Code | What it means | Check first |
|---|---|---|
| 2 | Low oil pressure. The oil pressure switch shut the engine down to protect it. | Park level and check the dipstick. |
| 3 | Service fault. Three blinks means a two-digit code is stored and you need to read it. | Press STOP/PRIME once. The light will now blink the two-digit code. |
| 4 | Over crank. The engine cranked for 30 seconds without starting. | Check the fuel level and fill the tank if it is low. |
| 12 | Over voltage. The control could not hold the output voltage at the right level. | Write down the code plus the model and serial number from the generator nameplate. |
| 13 | Under voltage. The control could not hold the output voltage up, usually because the load is too big. | Turn off some appliances, mainly air conditioners and battery chargers. |
| 14 | Over frequency. The engine governor could not hold the right speed, so the output frequency ran high. | Write down the code plus the model and serial number from the generator nameplate. |
| 15 | Under frequency. The engine governor could not hold the right speed, usually because the load is too big. | Turn off some appliances, mainly air conditioners and battery chargers. |
| 27 | Voltage sense fault. The control cannot read the generator output voltage. | Write down the code plus the model and serial number from the generator nameplate. |
| 29 | High battery voltage. The generator saw more than 19 volts on its battery. | Check how the batteries that serve the generator are wired. They must be in parallel for 12 volts. |
| 31 | Over speed. The engine ran faster than 3400 RPM. | Write down the code plus the model and serial number from the generator nameplate. |
| 32 | Low cranking speed. The engine turned slower than 180 RPM for more than 2 seconds while cranking. | Clean and tighten the battery cables at the battery and at the generator. |
| 35 | Control card failure. The control found a memory (EEPROM) error during its self test. | Write down the code plus the model and serial number from the generator nameplate. |
| 36 | Engine stopped. The engine quit on its own without a stop command from the control. | Check the fuel level and fill the tank if it is low. |
| 37 | Invalid generator set configuration. The frequency to RPM setting in the control is wrong. | Write down the code plus the model and serial number from the generator nameplate. |
| 38 | Over current (field overload). The generator was overloaded by loads like motors and compressors. | Turn off some appliances, mainly air conditioners and battery chargers. |
| 41 | Generator rotor fault. The control cannot read the field or output voltage. | Write down the code plus the model and serial number from the generator nameplate. |
| 42 | Processor fault. The control found a memory (ROM) error during its self test. | Write down the code plus the model and serial number from the generator nameplate. |
| 43 | Processor fault. The control found a memory (RAM) error during its self test. | Write down the code plus the model and serial number from the generator nameplate. |
| 45 | Speed sense fault. The control cannot read the engine speed signal. | Write down the code plus the model and serial number from the generator nameplate. |
| 47 | Ignition fault. The control cannot sense the ignition. | Write down the code plus the model and serial number from the generator nameplate. |
| 48 | Generator field sense fault. The control cannot read the field voltage. | Write down the code plus the model and serial number from the generator nameplate. |
Source: Cummins Onan Operator Manual, Onan Generator Set for RV, HGJBB (Spec A-B), A031C171 Issue 8 · Open in the lookup · RV generator troubleshooting
Cummins Onan QG 2800i inverter error codes
Models: RV QG 2800i gasoline and QG 2500i LP inverter (HGLAA series, Spec A and B)
After a fault shutdown, the status light in the start/stop switch blinks the code number: a long pause, a group of blinks for the first digit, a short pause, then a group for the second digit. Count each group to get the code; every code on this list shuts the generator down.
Where it shows: Blinks of the status light on the start/stop switch
| Code | What it means | Check first |
|---|---|---|
| 1 | High engine temperature. The engine oil got hotter than the safe limit. | Reduce the load, and keep in mind very hot weather or high altitude lowers what the generator can carry. |
| 4 | Over crank. The engine did not reach running speed after cranking. | Check that the RV fuel level is above the generator minimum. Most RVs cut off generator fuel well before the gauge reads empty. |
| 6 | Low oil level. The oil level switch found the oil too low. | Check the engine oil level and do any scheduled maintenance that is due. |
| 12 | Output over voltage. The AC output voltage went above the safe limit. | Write down the code plus the model and serial number from the generator nameplate. |
| 13 | Output under voltage. The AC output voltage dropped below the safe limit. | Write down the code plus the model and serial number from the generator nameplate. |
| 14 | Output over frequency. The AC output frequency went above the safe limit. | Write down the code plus the model and serial number from the generator nameplate. |
| 15 | Output under frequency. The AC output frequency dropped below the safe limit. | Write down the code plus the model and serial number from the generator nameplate. |
| 19 | Actuator circuit fault. A short circuit was found in the throttle actuator circuit. | Write down the code plus the model and serial number from the generator nameplate. |
| 25 | Alternator over voltage. The alternator voltage is too high. | Write down the code plus the model and serial number from the generator nameplate. |
| 26 | Alternator under voltage. The alternator voltage is too low. | Check that the RV fuel level is above the generator minimum. Most RVs cut off generator fuel well before the gauge reads empty. |
| 27 | PMA sense lost. The control saw no alternator rotation between crank sensor pulses. | Write down the code plus the model and serial number from the generator nameplate. |
| 29 | Battery over voltage. The battery voltage is above the control's safe limit. | Check the generator starting battery is the right voltage. |
| 31 | Engine over speed. The engine ran faster than its safe limit. | Turn off big loads before starting, then add them after the generator is running. |
| 32 | Crank under speed. The engine did not reach the minimum cranking speed. | Check the starting battery charge and voltage, and that it meets the minimum cold cranking amps rating. |
| 34 | High inverter temperature. The inverter got hotter than its safe limit. | Reduce the load, and keep in mind very hot weather or high altitude lowers what the generator can carry. |
| 35 | EE checksum fault. The inverter/controller found errors when it started up. | Write down the code plus the model and serial number from the generator nameplate. |
| 36 | Mechanical fault. The generator shut down without a command from the controller. | Check that the RV fuel level is above the generator minimum. Most RVs cut off generator fuel well before the gauge reads empty. |
| 38 | Output overload. The load current went over the limit and the built-in virtual breaker tripped. | Check the generator rated output on the nameplate. |
| 43 | RAM fault. The inverter/controller found errors when it started up. | Write down the code plus the model and serial number from the generator nameplate. |
| 45 | Crank position sense lost. No crank position signal was seen for two full turns. | Write down the code plus the model and serial number from the generator nameplate. |
| 49 | Actuator overload. The engine speed did not go up after the throttle was told to open. | Do any scheduled maintenance that is due. |
| 52 | Injector or lift pump circuit fault. The fuel injector or lift pump circuit is open or shorted. | Write down the code plus the model and serial number from the generator nameplate. |
| 53 | Oil temperature sensor circuit fault. The sensor circuit is open or shorted. | Write down the code plus the model and serial number from the generator nameplate. |
| 54 | MAT sensor circuit fault. The manifold air temperature sensor circuit is open or shorted. | Write down the code plus the model and serial number from the generator nameplate. |
| 56 | MAP sensor circuit fault. The manifold pressure sensor circuit is open or shorted. | Write down the code plus the model and serial number from the generator nameplate. |
| 67 | IGBT over current fault. The AC output circuit is shorted. | Write down the code plus the model and serial number from the generator nameplate. |
| 74 | Unprogrammed board. The inverter/controller has not been programmed. | Write down the code plus the model and serial number from the generator nameplate. |
| 81 | Alternator stator circuit fault. An alternator phase is shorted to ground at startup. | Write down the code plus the model and serial number from the generator nameplate. |
| 82 | Vent pressure sensor circuit fault. The fuel injection pump vent pressure sensor circuit is open or shorted. | Write down the code plus the model and serial number from the generator nameplate. |
Source: Cummins Onan Operator Manual, Generator Set HGLAA Spec B, A075S349 Issue 3 (same code list in HGLAA Spec A manual A062Y985) · Open in the lookup · RV generator troubleshooting
Cummins Onan QG 4000 / MicroQuiet 4000 error codes
Models: RV QG 4000 / MicroQuiet 4000 gasoline and QG 3600 LP (KY series, Spec J to R)
After a fault shutdown, count the blinks on the status light in the start/stop switch: 3 blinks is a service fault and 4 blinks is over crank. For 3 blinks, press STOP/PRIME once and the light blinks a two-digit code, tens first, a short pause, then the ones (code 36 is 3 blinks, pause, 6 blinks), and if the blinking has stopped, press STOP/PRIME 3 times within 5 seconds to see it again.
Where it shows: Blinks of the status light on the start/stop switch
| Code | What it means | Check first |
|---|---|---|
| 3 | Service fault. Three blinks means a two-digit code is stored and you need to read it. | Press STOP/PRIME once. The light will now blink the two-digit code. |
| 4 | Over crank. The engine cranked for 30 seconds without starting. | Check the fuel level and fill the tank if it is low. |
| 12 | Over voltage. The control could not hold the output voltage at the right level. | Write down the code plus the model and serial number from the generator nameplate. |
| 13 | Under voltage. The control could not hold the output voltage up, usually because the load is too big. | Turn off some appliances, mainly air conditioners and battery chargers. |
| 14 | Over frequency. The engine governor could not hold the right speed, so the output frequency ran high. | Write down the code plus the model and serial number from the generator nameplate. |
| 15 | Under frequency. The engine governor could not hold the right speed, usually because the load is too big. | Turn off some appliances, mainly air conditioners and battery chargers. |
| 27 | Voltage sense fault. The control cannot read the generator output voltage. | Write down the code plus the model and serial number from the generator nameplate. |
| 29 | High battery voltage. The generator saw more than 19 volts on its battery. | Check how the batteries that serve the generator are wired. They must be in parallel for 12 volts. |
| 32 | Low cranking speed. The engine turned slower than 180 RPM for more than 2 seconds while cranking. | Clean and tighten the battery cables at the battery and at the generator. |
| 35 | Control card failure. The control found a memory (EEPROM) error during its self test. | Write down the code plus the model and serial number from the generator nameplate. |
| 36 | Engine stopped. The engine quit on its own without a stop command from the control. | Check the fuel level and fill the tank if it is low. |
| 37 | Invalid generator set configuration. The frequency to RPM setting in the control is wrong. | Write down the code plus the model and serial number from the generator nameplate. |
| 38 | Over current (field overload). The generator was overloaded by loads like motors and compressors. | Turn off some appliances, mainly air conditioners and battery chargers. |
| 41 | Generator rotor fault. The control cannot read the field or output voltage. | Write down the code plus the model and serial number from the generator nameplate. |
| 42 | Processor fault. The control found a memory (ROM) error during its self test. | Write down the code plus the model and serial number from the generator nameplate. |
| 43 | Processor fault. The control found a memory (RAM) error during its self test. | Write down the code plus the model and serial number from the generator nameplate. |
| 45 | Speed sense fault. The control cannot read the engine speed signal. | Write down the code plus the model and serial number from the generator nameplate. |
| 47 | Ignition fault. The control cannot sense the ignition. | Write down the code plus the model and serial number from the generator nameplate. |
| 48 | Generator field sense fault. The control cannot read the field voltage. | Write down the code plus the model and serial number from the generator nameplate. |
Source: Cummins Onan Operator Manual, Onan Generator Set for RV, KY (Spec P-R), A041D131 Issue 8 (same code list in KY Spec J-N manual 981-0159) · Open in the lookup · RV generator troubleshooting
Cummins Onan QG 4000i dual fuel error codes
Models: RV QG 4000i DF dual fuel inverter, gasoline or LP (HGLDA series, Spec A)
After a fault shutdown, the status light in the start/stop switch blinks the code: 1 blink is engine too hot and 4 blinks is over crank. Two-digit codes blink on their own as a group for the tens, a short pause, then a group for the ones (code 36 is 3 blinks, pause, 6 blinks), and if the blinking has stopped, press STOP/PRIME 3 times within 5 seconds to see it again.
Where it shows: Blinks of the status light on the start/stop switch
| Code | What it means | Check first |
|---|---|---|
| 1 | Engine temperature exceeded limit. The engine oil got hotter than the high temperature limit. | Shut the generator down and let it cool. |
| 4 | Over crank. The engine cranked for 15 seconds without starting. | Check the fuel level and fill the tank if it is low. |
| 6 | Low oil pressure. The oil pressure switch shut the engine down. | Park level and check the dipstick. |
| 12 | Over voltage. The control could not hold the output voltage at the right level. | Write down the code plus the model and serial number from the generator nameplate. |
| 13 | Under voltage. The control could not hold the output voltage up, usually because the load is too big. | Turn off some appliances, mainly air conditioners and battery chargers. |
| 14 | Over frequency. The engine governor could not hold the right speed, so the output frequency ran high. | Write down the code plus the model and serial number from the generator nameplate. |
| 15 | Under frequency. The engine governor could not hold the right speed, usually because the load is too big. | Turn off some appliances, mainly air conditioners and battery chargers. |
| 19 | Actuator circuit fault. The throttle position sensor or step motor circuit is open or shorted. | Write down the code plus the model and serial number from the generator nameplate. |
| 25 | Alternator over voltage. The inverter bus voltage went too high (250 V). The engine keeps running but there is no AC power. | Shut the generator down and restart it. |
| 26 | Alternator under voltage. The inverter bus voltage dropped too low (150 V). The engine keeps running but there is no AC power. | Turn off some appliances, mainly air conditioners and battery chargers. |
| 27 | PMA sense lost. The control cannot read the internal system frequency. | Write down the code plus the model and serial number from the generator nameplate. |
| 29 | High battery voltage. The generator saw more than 20 volts on its battery. | Check how the batteries that serve the generator are wired. They must be in parallel for 12 volts. |
| 31 | Over speed. The engine ran faster than 3800 RPM. | Write down the code plus the model and serial number from the generator nameplate. |
| 34 | Inverter temperature exceeded limit. The inside of the inverter got too hot. | Shut the generator down and let it cool. |
| 36 | Other faults. The generator shut down for a reason not covered by another code, or the ignition coil has an open circuit or over current. | Write down the code plus the model and serial number from the generator nameplate. |
| 38 | Over current. The generator was overloaded. | Turn off some appliances, mainly air conditioners and battery chargers. |
| 43 | ECU fault. The engine control unit has a problem. | Write down the code plus the model and serial number from the generator nameplate. |
| 45 | Speed sense fault. The control cannot find the engine speed. | Write down the code plus the model and serial number from the generator nameplate. |
| 52 | Fuel injector or pump circuit fault. There is an open or short circuit in the fuel injector or pump circuit. | Write down the code plus the model and serial number from the generator nameplate. |
| 53 | Oil temperature sensor circuit fault. The engine oil temperature sensor circuit is open or shorted. | Write down the code plus the model and serial number from the generator nameplate. |
| 54 | MAT sensor fault. There is an open or short circuit in the manifold air temperature sender. | Write down the code plus the model and serial number from the generator nameplate. |
| 57 | Over prime or LP fault. Priming ran for more than 3 minutes on gasoline, or the propane pressure is too high or too low, or the propane solenoid valve is stuck open. | Write down the code plus the model and serial number from the generator nameplate. |
| 73 | AC output circuit fault. A short from the AC output to ground was found. | Write down the code plus the model and serial number from the generator nameplate. |
| 81 | Alternator stator circuit fault. A short was found inside the alternator. | Write down the code plus the model and serial number from the generator nameplate. |
| 85 | Oxygen sensor fault. The oxygen sensor is not working right. | Write down the code plus the model and serial number from the generator nameplate. |
Source: Cummins Onan Operator Manual, Onan Generator Set for RV, HGLDA Spec A, A080H582 Issue 1 · Open in the lookup · RV generator troubleshooting
Cummins Onan QG 5500 / 7000 error codes
Models: RV QG 5500, 5500 EVAP, 5500 EFI, 7000, 7000 EVAP, 7000 EFI gasoline and QG 5500 LP, 6500 LP (HGJAA and HGJAB series, Spec J and later)
After a fault shutdown, count the blinks on the status light in the start/stop switch: 2 blinks is low oil pressure, 3 blinks is a service fault and 4 blinks is over crank. For 3 blinks, press STOP/PRIME once and the light blinks a two-digit code, tens first, a short pause, then the ones (code 36 is 3 blinks, pause, 6 blinks), and if the blinking has stopped, press STOP/PRIME 3 times within 5 seconds to see it again.
Where it shows: Blinks of the status light on the start/stop switch
| Code | What it means | Check first |
|---|---|---|
| 2 | Low oil pressure. The oil pressure switch shut the engine down to protect it. | Park level and check the dipstick. |
| 3 | Service fault. Three blinks means a two-digit code is stored and you need to read it. | Press STOP/PRIME once. The light will now blink the two-digit code. |
| 4 | Over crank. The engine cranked for 30 seconds without starting. | Check the fuel level and fill the tank if it is low. |
| 12 | Over voltage. The control could not hold the output voltage at the right level. | Write down the code plus the model and serial number from the generator nameplate. |
| 13 | Under voltage. The control could not hold the output voltage up, usually because the load is too big. | Turn off some appliances, mainly air conditioners and battery chargers. |
| 14 | Over frequency. The engine governor could not hold the right speed, so the output frequency ran high. | Write down the code plus the model and serial number from the generator nameplate. |
| 15 | Under frequency. The engine governor could not hold the right speed, usually because the load is too big. | Turn off some appliances, mainly air conditioners and battery chargers. |
| 19 | Governor actuator fault. The control found an open or shorted circuit in the part that moves the throttle. | Write down the code plus the model and serial number from the generator nameplate. |
| 22 | Governor actuator overload. The engine has been working near full throttle for too long. | Turn off some appliances, mainly air conditioners and battery chargers. |
| 27 | Voltage sense fault. The control cannot read the generator output voltage. | Write down the code plus the model and serial number from the generator nameplate. |
| 29 | High battery voltage. The generator saw more than 19 volts on its battery. | Check how the batteries that serve the generator are wired. They must be in parallel for 12 volts. |
| 31 | Over speed. The engine ran faster than 3400 RPM. | Write down the code plus the model and serial number from the generator nameplate. |
| 32 | Low cranking speed. The engine turned slower than 180 RPM for more than 2 seconds while cranking. | Clean and tighten the battery cables at the battery and at the generator. |
| 35 | Control card failure. The control found a memory (EEPROM) error during its self test. | Write down the code plus the model and serial number from the generator nameplate. |
| 36 | Engine stopped. The engine quit on its own without a stop command from the control. | Check the fuel level and fill the tank if it is low. |
| 37 | Invalid generator set configuration. The frequency to RPM setting in the control is wrong. | Write down the code plus the model and serial number from the generator nameplate. |
| 38 | Over current (field overload). The generator was overloaded by loads like motors and compressors. | Turn off some appliances, mainly air conditioners and battery chargers. |
| 41 | Generator rotor fault. The control cannot read the field or output voltage. | Write down the code plus the model and serial number from the generator nameplate. |
| 42 | Processor fault. The control found a memory (ROM) error during its self test. | Write down the code plus the model and serial number from the generator nameplate. |
| 43 | Processor fault. The control found a memory (RAM) error during its self test. | Write down the code plus the model and serial number from the generator nameplate. |
| 45 | Speed sense fault. The control cannot read the engine speed signal. | Write down the code plus the model and serial number from the generator nameplate. |
| 47 | Ignition fault. The control cannot sense the ignition. | Write down the code plus the model and serial number from the generator nameplate. |
| 48 | Generator field sense fault. The control cannot read the field voltage. | Write down the code plus the model and serial number from the generator nameplate. |
| 51 | Processor fault. The control microprocessor is not working right. | Write down the code plus the model and serial number from the generator nameplate. |
| 52 | Fuel injector fault. There is an open or short circuit in the fuel injector. | Write down the code plus the model and serial number from the generator nameplate. |
| 54 | MAT sender fault. There is an open or short circuit in the manifold air temperature sender. | Write down the code plus the model and serial number from the generator nameplate. |
| 56 | MAP sender fault. There is an open or short circuit in the manifold pressure sender. | Write down the code plus the model and serial number from the generator nameplate. |
| 57 | Over prime. The fuel priming ran for more than 3 minutes. | Check both the switch on the generator and the remote switch inside the RV. |
| 58 | Exhaust gas temperature shutdown. The exhaust reached 1202°F for 2 seconds while running. | Write down the code plus the model and serial number from the generator nameplate. |
| 81 | Exhaust temperature sensor open. The sensor read too low (under 140°F) for 2 minutes while running, or did not warm up within 2 minutes of starting. | Write down the code plus the model and serial number from the generator nameplate. |
| 82 | Exhaust temperature sensor shorted. The sensor read 1832°F for 1 second while running or starting. | Write down the code plus the model and serial number from the generator nameplate. |
Source: Cummins Onan Operator Manual, Onan Generator Set for RV, HGJAA (Spec J-K) and HGJAB (Spec J-L), A035D009 Issue 12 (codes match Issue 15, 5-2024) · Open in the lookup · RV generator troubleshooting
Cummins Onan QG 7000i dual fuel error codes
Models: RV QG 7000i DF dual fuel inverter, gasoline or LP (HGLCA series, Spec A)
After a fault shutdown, the status light in the start/stop switch blinks the code: 1 blink is engine too hot and 4 blinks is over crank. Two-digit codes blink on their own as a group for the tens, a short pause, then a group for the ones (code 36 is 3 blinks, pause, 6 blinks), and if the blinking has stopped, press STOP/PRIME 3 times within 5 seconds to see it again.
Where it shows: Blinks of the status light on the start/stop switch
| Code | What it means | Check first |
|---|---|---|
| 1 | Engine temperature exceeded limit. The engine oil got hotter than the high temperature limit. | Shut the generator down and let it cool. |
| 4 | Over crank. The engine cranked for 15 seconds without starting. | Check the fuel level and fill the tank if it is low. |
| 6 | Low oil pressure. The oil pressure switch shut the engine down. | Park level and check the dipstick. |
| 12 | Over voltage. The control could not hold the output voltage at the right level. | Write down the code plus the model and serial number from the generator nameplate. |
| 13 | Under voltage. The control could not hold the output voltage up, usually because the load is too big. | Turn off some appliances, mainly air conditioners and battery chargers. |
| 14 | Over frequency. The engine governor could not hold the right speed, so the output frequency ran high. | Write down the code plus the model and serial number from the generator nameplate. |
| 15 | Under frequency. The engine governor could not hold the right speed, usually because the load is too big. | Turn off some appliances, mainly air conditioners and battery chargers. |
| 19 | Actuator circuit fault. The throttle position sensor or step motor circuit is open or shorted. | Write down the code plus the model and serial number from the generator nameplate. |
| 25 | Alternator over voltage. The inverter bus voltage went too high (250 V). The engine keeps running but there is no AC power. | Shut the generator down and restart it. |
| 26 | Alternator under voltage. The inverter bus voltage dropped too low (150 V). The engine keeps running but there is no AC power. | Turn off some appliances, mainly air conditioners and battery chargers. |
| 27 | PMA sense lost. The control cannot read the internal system frequency. | Write down the code plus the model and serial number from the generator nameplate. |
| 29 | High battery voltage. The generator saw more than 20 volts on its battery. | Check how the batteries that serve the generator are wired. They must be in parallel for 12 volts. |
| 31 | Over speed. The engine ran faster than 3300 RPM. | Write down the code plus the model and serial number from the generator nameplate. |
| 34 | Inverter temperature exceeded limit. The inside of the inverter got too hot. | Shut the generator down and let it cool. |
| 36 | Other faults. The generator shut down for a reason not covered by another code, or the ignition coil has an open circuit or over current. | Write down the code plus the model and serial number from the generator nameplate. |
| 38 | Over current. The generator was overloaded. | Turn off some appliances, mainly air conditioners and battery chargers. |
| 43 | ECU fault. The engine control unit has a problem. | Write down the code plus the model and serial number from the generator nameplate. |
| 45 | Speed sense fault. The control cannot find the engine speed. | Write down the code plus the model and serial number from the generator nameplate. |
| 52 | Fuel injector or pump circuit fault. There is an open or short circuit in the fuel injector or pump circuit. | Write down the code plus the model and serial number from the generator nameplate. |
| 53 | Oil temperature sensor circuit fault. The engine oil temperature sensor circuit is open or shorted. | Write down the code plus the model and serial number from the generator nameplate. |
| 54 | MAT sensor fault. There is an open or short circuit in the manifold air temperature sender. | Write down the code plus the model and serial number from the generator nameplate. |
| 57 | Over prime or LP fault. Priming ran for more than 3 minutes on gasoline, or the propane pressure is too high or too low, or the propane solenoid valve is stuck open. | Write down the code plus the model and serial number from the generator nameplate. |
| 73 | AC output circuit fault. A short from the AC output to ground was found. | Write down the code plus the model and serial number from the generator nameplate. |
| 81 | Alternator stator circuit fault. A short was found inside the alternator. | Write down the code plus the model and serial number from the generator nameplate. |
| 85 | Oxygen sensor fault. The oxygen sensor is not working right. | Write down the code plus the model and serial number from the generator nameplate. |
Source: Cummins Onan Operator Manual, Onan Generator Set for RV, HGLCA (Spec A), A079E225 Issue 1 · Open in the lookup · RV generator troubleshooting
RV AC and thermostat error codes
Wall thermostats show these codes, not the rooftop unit. Most point to a sensor, lost contact with the control board in the roof unit, or no 120-volt power.
Coleman-Mach (Airxcel RV Products) 9330 multi-zone thermostat · Coleman-Mach (Airxcel RV Products) 9420 digital thermostat · Coleman-Mach (Airxcel RV Products) 9630 heat pump thermostat · Dometic CT touch thermostat · Dometic CCC 2 multi-zone thermostat · Dometic CCC 2 thermostat with dehumidify · Dometic Single Zone LCD thermostat · Furrion (Lippert) Chill Cube rooftop AC · Furrion (Lippert) Chill enhanced thermostat (FACW10ESSA) · Furrion (Lippert) Chill single zone thermostat (FACW10SA)
Coleman-Mach (Airxcel RV Products) 9330 multi-zone thermostat error codes
Models: 9330-33* multi-zone digital thermostat for RV Products zone control boxes (up to 4 zones)
This thermostat shows "Er" in the temperature space when it cannot read a good temperature. The green LED on the control board in the ceiling unit tells you if the 12-volt control power is good.
Where it shows: Word on the thermostat display, plus a green LED on the A/C control board
| Code | What it means | Check first |
|---|---|---|
| Er | The temperature is outside what the thermostat can read, or one of the remote temperature sensors has a problem. | Switch through the zones with the ZONE button and note which zone shows Er. |
| Gas (flashing) | Electric heat (heat pump or heat strip) could not keep up three times in a row, so it is locked out for 2 hours and the gas furnace is now the main heat. This is normal, not a fault. | Nothing to fix. The thermostat goes back to electric heat after the 2-hour lockout. |
| Green LED off | The green LED on the control board (seen through an opening in the control box in the return air area) is off, which means the 12-volt control power is not good enough to run the system. | Check the RV battery and charge it with shore power or the generator. |
Source: RV Products (Airxcel) 9330-33* Zone Thermostat Operation Guide (LIAF168), hosted by Forest River · Open in the lookup · RV air conditioner troubleshooting
Coleman-Mach (Airxcel RV Products) 9420 digital thermostat error codes
Models: Digital wall thermostat 9420*381 and 9420*382 (knob control)
This thermostat does not list numbered error codes. It shows a few words and blinking parts that tell you what the system is doing. If the screen goes dead, it has a self-resetting fuse that opens when the wiring is wrong or shorted.
Where it shows: Word or blinking part of the thermostat display
How to reset: Manual reboot from the guide: press and hold the knob for about 12 seconds. At 4 seconds it shows the units screen. After 4 more seconds a countdown starts. When the countdown ends and the screen turns off, let go of the knob and it reboots. A reboot is also needed after any DIP switch change.
| Code | What it means | Check first |
|---|---|---|
| LO | The room temperature is below 33 degrees F, which is under the range the screen can show. | Warm the RV and see if a normal temperature comes back. |
| HI | The room temperature is above 99 degrees F, which is over the range the screen can show. | Open the RV, run the A/C and see if a normal temperature comes back. |
| Mode segment blinking | The 3-minute short cycle delay is running. The compressor or electric heat waits 3 minutes after it last shut off before it can start again. | Wait 3 minutes. The thermostat goes back to normal on its own. |
| Elec (flashing) | The gas furnace is running as backup because the electric heat could not keep up. After three strikes, electric heat is turned off for 1 hour 45 minutes and gas becomes the main heat. | Nothing to fix. Electric heat comes back as the main heat after the lockout ends. |
Source: Coleman-Mach Installation, Operation and Application Guide for Digital Wall Thermostat 9420*381 and 9420*382 (1980R189) · Open in the lookup · RV air conditioner troubleshooting
Coleman-Mach (Airxcel RV Products) 9630 heat pump thermostat error codes
Models: Heat pump wall thermostat 9630*352* (Bluetooth, RVClimate app)
This thermostat lists one warning on its display. It also has a replaceable 2-amp fuse on its base that opens if the wiring is wrong or shorted, and the guide says to find the cause before you replace the fuse.
Where it shows: Word flashing on the thermostat display
| Code | What it means | Check first |
|---|---|---|
| ELEC (flashing) | In electric heat mode, the heat pump could not keep up, so it is in lockout and the gas furnace provides backup heat. | Nothing to fix. The backup counter resets when the heat pump runs more than 20 minutes and reaches the set point on its own. |
Source: Coleman-Mach Installation, Operation and Application Guide, Heat Pump 9630*352* (LIAF253) · Open in the lookup · RV air conditioner troubleshooting
Dometic CT touch thermostat error codes
Models: CT (Capacitive Touch) thermostat 3316410 and Bluetooth CT thermostat 3316420 (cool/furnace, cool/furnace/heat strip, cool/furnace/heat pump)
The CT thermostat shows a code on its screen when the system finds a fault. The Bluetooth model 3316420 uses the same five codes.
Where it shows: Code on the thermostat display
How to reset: The manual lists a system initialization that the installer does after setup. Make sure the thermostat is off. Press the up (+) button and at the same time press and hold the On/Off Mode button for three seconds. The screen shows "- -". On the Bluetooth model this also deletes all paired phones, so you must pair them again.
| Code | What it means | Check first |
|---|---|---|
| E1 | The thermostat lost contact with the module board in the air conditioner, so the system shuts down. | Watch the screen. With E1 it switches back and forth between E1 and the last mode you picked. |
| E2 | The indoor temperature sensor reads as open or out of range. Heating and cooling are locked out, but the fan still works. | Use fan mode to move air until the sensor is fixed. |
| E3 | The indoor temperature sensor is shorted. Heating and cooling are locked out, but the fan still works. | Use fan mode to move air until the sensor is fixed. |
| E4 | The outdoor temperature sensor reads as open or out of range (only on some models). The heat pump is locked out, but cooling, fan and furnace still work. | Use furnace mode for heat until the sensor is fixed. |
| E5 | The freeze sensor reads as open or out of range. Cooling is locked out, and the screen shows the last set temperature. | Use fan mode to move air until the sensor is fixed. |
Source: Dometic Capacitive Touch Thermostat 3316410.XXX Operating Instructions, Form No. 3316464.000 (Rev. B, 08/16), hosted by Forest River · Open in the lookup · RV air conditioner troubleshooting
Dometic CCC 2 multi-zone thermostat error codes
Models: Comfort Control Center 2 (CCC 2) programmable multi-zone thermostat, model 3314080 (.000 black, .015 white), up to 4 zones
On the CCC 2, a blinking zone number during normal use means a fault happened in that zone. Select that zone and the error code shows where the set temperature normally is.
Where it shows: Code on the thermostat display, in place of the set temperature for the zone that has the fault
How to reset: System reset from the manual: put the CCC 2 in OFF mode. Press and hold the MODE and ZONE buttons at the same time. The screen shows "IniT" and all zones it finds. Let go of both buttons, then press ON/OFF to exit setup. A reset brings back the factory settings, so you will need to set your temperatures again. The manual says a reset is needed after a memory loss or any DIP switch change.
| Code | What it means | Check first |
|---|---|---|
| E1 | The thermostat lost contact with the power module board in one zone, or with all of them. If all boards are lost, the whole system shuts down. If only one is lost, the screen shows E1 with that zone number. | Note which zone number shows E1 or is blinking. Other zones that lose contact will blink too. |
| E2 | The indoor temperature sensor reads as open or out of range. All heating and cooling are locked out, but manual fan still works. | Use manual fan to move air until the sensor is fixed. |
| E3 | The indoor temperature sensor is shorted. All heating and cooling are locked out, but manual fan still works. | Use manual fan to move air until the sensor is fixed. |
| E4 | The outdoor temperature sensor reads as open or out of range (only on some models). The heat pump is locked out, but cooling, furnace, heat strip and fan still work. | Use the furnace or heat strip for heat until the sensor is fixed. |
| E5 | The freeze sensor reads as open or out of range. Cooling is locked out. Heat pump, furnace, heat strip and fan still work, and the screen shows the last set temperature. | Use fan mode to move air until the sensor is fixed. |
| E7 | None of the power module boards are getting 120-volt power, so the system shuts down. | If you are on a generator, make sure it is running and making power. |
| E8 | Zone setup is invalid: the heat pump and heat strip DIP switches are both ON for one zone. Heat pump, heat strip and A/C are locked out in that zone. | Note which zone shows the code. |
| E9 | Zone setup is invalid: the dehumidifier DIP switch and the heat pump or heat strip DIP switch are both ON for one zone. Heat pump, heat strip and A/C are locked out in that zone. | Note which zone shows the code. |
Source: Dometic Comfort Control Center 2 Thermostat Operating Instructions, Form No. 3314149.018 (Rev. B, 08/16) · Open in the lookup · RV air conditioner troubleshooting
Dometic CCC 2 thermostat with dehumidify error codes
Models: Comfort Control Center 2 (CCC 2) programmable thermostat, models 3312026 (with dehumidify) and 3312024 (without dehumidify)
This older CCC 2 version uses the same codes as model 3314080, plus E6 for the humidity sensor. A blinking zone number means a fault happened in that zone.
Where it shows: Code on the thermostat display, in place of the set temperature for the zone that has the fault
How to reset: System reset from the manual: put the CCC 2 in OFF mode, then press and hold the MODE and ZONE buttons at the same time. Let go when the screen shows all zones, then press ON/OFF to exit. Factory settings come back after a reset.
| Code | What it means | Check first |
|---|---|---|
| E1 | The thermostat lost contact with one zone's power module board, or with all of them. If all are lost, the system shuts down. If one is lost, E1 shows with that zone number. | Note which zone number shows E1 or is blinking. |
| E2 | The indoor temperature sensor reads as open or out of range. All heating, cooling and dehumidify are locked out, but manual fan still works. | Use manual fan to move air until the sensor is fixed. |
| E3 | The indoor temperature sensor is shorted. All heating, cooling and dehumidify are locked out, but manual fan still works. | Use manual fan to move air until the sensor is fixed. |
| E4 | The outdoor temperature sensor reads as open or out of range (only on some models). Heat pump and dehumidify are locked out. Cooling, furnace, heat strip and fan still work. | Use the furnace or heat strip for heat until the sensor is fixed. |
| E5 | The freeze sensor reads as open or out of range. Cooling and dehumidify are locked out. Heat pump, furnace, heat strip and fan still work. | Use fan mode to move air until the sensor is fixed. |
| E6 | The humidity sensor reads as open (only on models with dehumidify). Cooling and dehumidify are locked out. Heat pump, furnace, heat strip and fan still work. | Use fan or a heating mode until the sensor is fixed. |
| E7 | None of the power module boards are getting 120-volt power, so the system shuts down. | Make sure the generator is running or shore power is plugged in. |
| E8 | Zone setup is invalid: the heat pump and heat strip DIP switches are both ON for one zone. Heat pump, heat strip, A/C and dehumidify are locked out in that zone. | After the DIP switches are corrected, do the system reset. |
| E9 | Zone setup is invalid: the dehumidifier DIP switch and the heat pump or heat strip DIP switch are both ON for one zone. Heat pump, heat strip, A/C and dehumidify are locked out in that zone. | After the DIP switches are corrected, do the system reset. |
Source: Dometic Comfort Control Center 2 Thermostat Operating Instructions, models 3312026/3312024, Form No. 3312366.000 (1/10), hosted by Newmar · Open in the lookup · RV air conditioner troubleshooting
Dometic Single Zone LCD thermostat error codes
Models: Single Zone LCD thermostat, models 3313192 (cool/furnace), 3313193 (cool/furnace/heat pump) and 3313194 (cool/furnace/heat strip)
When the system finds a fault, the code shows on the thermostat screen. Some codes stop only one mode, so the fan or furnace may still work while you wait for a fix.
Where it shows: Code on the thermostat display
How to reset: The manual lists a system initialization that the installer does after setup. Turn the thermostat off. Press and hold the + button, then also press and hold the On/Off Mode button for three seconds. Press On/Off Mode again to turn the system off. Do this only if a tech or the manual tells you to, since it is part of setup.
| Code | What it means | Check first |
|---|---|---|
| E1 | The thermostat lost contact with the control board in the air conditioner, so the whole system shuts down. | Watch the screen. With E1 it switches back and forth between E1 and the last mode you picked. |
| E2 | The indoor temperature sensor reads as open (no signal) or out of range. Heating and cooling are locked out, but the fan still works. | Use fan mode to move air until the sensor is fixed. |
| E3 | The indoor temperature sensor is shorted. Heating and cooling are locked out, but the fan still works. | Use fan mode to move air until the sensor is fixed. |
| E4 | The outdoor temperature sensor reads as open or out of range (only on some models). The heat pump is locked out, but cooling, fan and furnace still work. | Use furnace mode for heat until the sensor is fixed. |
| E5 | The freeze sensor reads as open or out of range. Air conditioning (cooling) is locked out. Furnace, heat strip, heat pump and fan still work, and the screen shows the last set temperature. | Use fan mode to move air until the sensor is fixed. |
Source: Dometic Single Zone LCD Thermostat Operating Instructions, Form No. 3313327.045 (Rev. A, 08/16) · Open in the lookup · RV air conditioner troubleshooting
Furrion (Lippert) Chill Cube rooftop AC error codes
Models: Furrion Chill Cube variable speed rooftop A/C and Chill Cube Ducted: FACR15HEDA, FACR18HEDA, FACR15HEPA, FACR18HEPA, FACR15VSSA, FACR18VSSA, FACR18VSDA, with FACT18MA and FACT18VSDA air distribution boxes
The Chill Cube shows these codes on the display of the ceiling unit. Several of them can clear after a power restart, so try that first. If you see a code that is not on this list, make sure it is not just a temperature reading.
Where it shows: Code on the indoor unit (ceiling) display
| Code | What it means | Check first |
|---|---|---|
| EH00 | The display board cannot read its memory chip (EEPROM). | Turn off power to the A/C, wait 2 minutes, then turn it back on. |
| EC51 | The main control board cannot read its memory chip (EEPROM). | Turn off power to the A/C, wait 2 minutes, then turn it back on. |
| EH03 | The indoor fan speed stayed too low or too high for too long, so the A/C turned off. | Turn off power to the A/C, wait 2 minutes, then turn it back on. |
| EC07 | The outdoor fan speed is out of the normal range (over-current, phase loss, zero speed or similar), so the A/C turned off. | Turn off power to the A/C, wait 2 minutes, then turn it back on. |
| EH60 | The indoor room temperature sensor (T1) is open or shorted. | Turn off power to the A/C, wait 2 minutes, then turn it back on to see if the code clears. |
| EH61 | The evaporator coil middle temperature sensor (T2) is open or shorted. | Turn off power to the A/C, wait 2 minutes, then turn it back on to see if the code clears. |
| EC52 | The condenser coil temperature sensor (T3) is open or shorted. | Turn off power to the A/C, wait 2 minutes, then turn it back on to see if the code clears. |
| EC53 | The outdoor air temperature sensor (T4) is open or shorted. | Turn off power to the A/C, wait 2 minutes, then turn it back on to see if the code clears. |
| EC54 | The compressor discharge temperature sensor (TP) is open or shorted. | Turn off power to the A/C, wait 2 minutes, then turn it back on to see if the code clears. |
| EH0b | The main board and the display board are not talking to each other. | Turn off power to the A/C, wait 2 minutes, then turn it back on. |
| EL0C | The system thinks it is low on refrigerant. | Turn off power to the A/C, wait 15 minutes, then turn it back on. |
| PC00 | The compressor drive module (IPM) has a fault or too much current, so the A/C turned off. | Turn off power to the A/C, then turn it back on and see if the code returns. |
| PC01 | The A/C saw voltage that is too high or too low and shut down to protect itself. | Check your power source. The unit is rated 115 volts. If you have a surge protector or meter with a display, look at the voltage. |
| PC02 | The compressor drive module (IPM) got too hot. | Turn off power to the A/C, then turn it back on and see if the code returns. |
| PC04 | The inverter compressor drive found a problem (signal, voltage or compressor speed). | Turn off power to the A/C, then turn it back on and see if the code returns. |
| FH0P | The Wi-Fi access point mode is on, but no Wi-Fi kit is found. | Turn off power to the A/C, wait 2 minutes, then turn it back on. |
Source: Chill Cube Rooftop Air Conditioner Troubleshooting and Service Manual, CCD-0010546 (Rev. 10.21.26), Lippert · Open in the lookup · RV air conditioner troubleshooting
Furrion (Lippert) Chill enhanced thermostat (FACW10ESSA) error codes
Models: Furrion Chill Enhanced Standard Single Zone wall thermostat FACW10ESSA-BL
The thermostat shows the code where the room temperature normally is. This model has two indoor sensors, one in the control box and one in the thermostat, and each has its own code.
Where it shows: Code on the thermostat display
| Code | What it means | Check first |
|---|---|---|
| E1 | The indoor temperature sensor in the control box is not working, so the system shuts down. | Turn the thermostat off and back on (press and hold the power button for 3 seconds each way) and see if E1 comes back. |
| E2 | The evaporator (cooling coil) temperature sensor is not working, so the system shuts down. | Turn the thermostat off and back on and see if E2 comes back. |
| E3 | The thermostat lost contact with the A/C control box, so the system shuts down. | Check the 12-volt fuse or breaker that feeds the A/C and thermostat. |
| E6 | The temperature sensor built into the thermostat is not working, so the system shuts down. | Turn the thermostat off and back on and see if E6 comes back. |
| lo | The 12-volt supply to the thermostat is too low, so the system shuts down. | Plug into shore power or start the generator so the converter can charge the battery. |
Source: Furrion Standard Single Zone Wall Thermostat Quick Start Guide, Model FACW10ESSA-BL (IG-FHA00033 V1.0), hosted by Forest River · Open in the lookup · RV air conditioner troubleshooting
Furrion (Lippert) Chill single zone thermostat (FACW10SA) error codes
Models: Furrion Chill Standard Single Zone wall thermostat FACW10SA-BL
The thermostat shows the code where the room temperature normally is. With every code on this model, the system shuts down until the fault is gone.
Where it shows: Code on the thermostat display
| Code | What it means | Check first |
|---|---|---|
| E1 | The indoor temperature sensor is not working, so the system shuts down. | Turn the thermostat off and back on (press and hold the power button for 3 seconds each way) and see if E1 comes back. |
| E2 | The evaporator (cooling coil) temperature sensor is not working, so the system shuts down. | Turn the thermostat off and back on and see if E2 comes back. |
| E3 | The thermostat lost contact with the A/C control box, so the system shuts down. | Check the 12-volt fuse or breaker that feeds the A/C and thermostat. |
| lo | The 12-volt supply to the thermostat is too low, so the system shuts down. | Plug into shore power or start the generator so the converter can charge the battery. |
Source: Furrion Standard Single Zone Thermostat Quick Start Guide, Model FACW10SA-BL (IG-FHA00031 V1.0), hosted by Forest River · Open in the lookup · RV air conditioner troubleshooting
Slide-out and leveling error codes
Lippert controllers blink red and green lights or show messages on the touch pad. Low battery voltage causes many of these faults, so check it first.
Lippert (LCI) Ground Control 3.0 with OneControl · Lippert (LCI) Ground Control 3.0 leveling · Lippert (LCI) In-Wall (Schwintek) slide-out · Lippert (LCI) Level-Up 5th wheel leveling · Lippert (LCI) Level-Up motorhome leveling · Lippert (LCI) SlimRack slide-out (auto controller) · Lippert (LCI) SlimRack slide-out (touchpad)
Lippert (LCI) Ground Control 3.0 with OneControl error codes
Models: Ground Control 3.0 5th wheel leveling with OneControl touch panel or app (4 and 6 point)
A blinking red LED on the leveling touch pad means read the message on the OneControl panel or app. On Rev. B systems, most faults clear by pressing Retract All.
Where it shows: Message on the OneControl touch panel or app, plus a red/green LED on the leveling touch pad
| Code | What it means | Check first |
|---|---|---|
| Solid red LED | Low battery. | Charge the battery and test it under load. |
| Blinking red LED | There is an error. Read the message on the OneControl panel or app. | Check the message on the OneControl panel or app. |
| Slow faded red, or red and green blinking together | There is a jack error. Read the jack fault on the OneControl panel or app. | Check the jack fault message. |
| EXCESS ANGLE | The controller is not secured, or the site is too uneven. | Check that the controller is mounted tight. |
| EXCESSIVE ANGLE | The angle got too steep during manual operation. | Stop and move the jacks back to a more level state. The code clears by itself. |
| BAD CALIBRATION | The trailer zero point was not set right. | Reset the zero point. |
| FEATURE DISABLED | Hitch recognition was asked for with no hitch height saved, or the zero point is not set. | Run AUTO LEVEL once to save the hitch height. |
| LOW VOLTAGE | Battery voltage is too low. | Check the wiring. |
| OUT OF STROKE | A jack ran out of travel. | Check that the controller is mounted tight. |
| EXTERNAL SENSOR | Bad connection or wiring to the rear remote sensor. | Check the rear remote sensor plug and wiring. |
| JACK TIME OUT | The system could not level in the expected time. | Check how the jacks are sitting. |
| AUTO LEVEL FAIL | Auto level did not finish. | Check that the controller is mounted tight. |
| FUNCTION ABORTED | Someone stopped an automatic leveling run. | Press OK and start the run again. |
| HALL POWER SHORT | A short circuit was found on one or more jack hall effect power lines. | Check the harness and repair or replace it. |
| Left-Front / Right-Front / Left-Mid / Right-Mid / Left-Rear / Right-Rear Jack Fault | Error at one jack. The hall signal is open, shorted, or lost, or the circuit to the motor is open or shorted. | Check the harness plugs at the controller and at that jack. |
Source: Lippert Ground Control 3.0 (5th Wheel) 4 and 6 Point OneControl Touch Panel Owner's Manual, CCD-0001519, Rev 06.28.18 (Forest River hosted copy) · Open in the lookup · RV slide-out troubleshooting
Lippert (LCI) Ground Control 3.0 leveling error codes
Models: Ground Control 3.0 electric leveling, LCD touch pad (travel trailer and 5th wheel, 4 and 6 point)
Fix the cause, then press ENTER to clear the message. If the problem is still there, the message comes back. Jack errors (LF Jack, RR Jack, and so on) clear only after the jacks are homed.
Where it shows: Message on the touch pad LCD, like ****ERROR**** Low Voltage
| Code | What it means | Check first |
|---|---|---|
| Excess Angle | The controller is not secured, or the angle got too steep during auto leveling. | Check that the controller is mounted tight and in the right direction. |
| Excessive Angle | The controller is not secured, or the angle got too steep. | Check that the controller is mounted tight. |
| Feature Disabled | Hitch Recognition or Auto Level cannot run right now. | Retract the rear jacks in manual mode and set the front jacks to hitch height. |
| Low Voltage | Battery voltage dropped below 10.8 volts. | Charge the battery and test it under load. |
| Out Of Stroke | A jack reached full length and cannot lift, or there was a sudden high current stall. | Check how the jacks are sitting and move the trailer if needed. |
| External Sensor | Bad connection or wiring between the controller and the rear sensor. | Check the rear remote sensor plug and wiring. |
| Jack Time Out | The auto operation took longer than its time limit. | Check how the jacks are sitting. |
| Auto Level Fail | The system could not level the trailer. | Move the trailer to more level ground. |
| Comm Error | The controller and touch pad lost contact. | Check the harness plugs at both ends. |
| Bad Calibration | Sensor calibration values are out of range. | The manual says to replace the controller. Contact Lippert or a dealer. |
| Internal Sensor | The sensor inside the controller has a problem. | The manual says to replace the controller. Contact Lippert or a dealer. |
| PANIC STOP / Function Aborted | A button was pressed during an automatic run, so it stopped. | Restart the automatic run and do not press any buttons until it finishes. |
| Hall Effect Short | A short circuit was found in one of the jack hall effect circuits. | Check the jack harnesses for damage. |
| LF / RF / LM / RM / LR / RR Jack | Error at one jack (left front, right front, left middle, right middle, left rear, right rear). The hall signal is open, shorted, or lost, or the motor circuit is open or shorted. | Check the harness plugs at the controller and at that jack. |
Source: Lippert Ground Control 3.0 Troubleshooting Guide, CCD-0001746, Rev 08.06.18 (Forest River hosted copy) · Open in the lookup · RV slide-out troubleshooting
Lippert (LCI) In-Wall (Schwintek) slide-out error codes
Models: In-Wall (Schwintek) electric slide-out controller
The green LED tells you which motor: 1 blink for motor 1, 2 blinks for motor 2. The red LED blinks 2 to 9 times for the error code. Pressing the wall switch again resets the board.
Where it shows: Blinking green and red LEDs on the slide controller board
| Code | What it means | Check first |
|---|---|---|
| 2 red blinks | Battery drop out. Battery voltage fell below 6 volts while the slide was running. | Charge the battery fully. |
| 3 red blinks | Low battery. Voltage was below 8 volts when the slide started. | Put the battery on a charger until full. |
| 4 red blinks | High battery. Voltage was above 18 volts. | Check battery voltage. |
| 5 red blinks | Excessive motor current. A motor drew too much power, usually from something blocking the room. | Look inside and outside for anything in the way and remove it. |
| 6 red blinks | Motor short circuit. The motor or its wiring has shorted. | Check the 12V fuse for the slide. |
| 8 red blinks | Hall signal not present. The motor's encoder is not sending a signal. This is the most common code. | Check that both motor plugs are firmly seated at the controller. |
| 9 red blinks | Hall power short to ground. Power to the encoder has shorted to ground. | Check the motor wiring for damage. |
Source: Lippert In-Wall Slide-Out Troubleshooting Quick Sheet, Rev 09.09.20 (Forest River hosted copy) · Open in the lookup · RV slide-out troubleshooting
Lippert (LCI) Level-Up 5th wheel leveling error codes
Models: Level-Up hydraulic auto leveling with LCD touch pad, 5th wheel
Fix the cause, then press ENTER to clear the message. If the problem is still there, the message comes back.
Where it shows: Message on the touch pad LCD
| Code | What it means | Check first |
|---|---|---|
| Excess Angle | The controller is not secured, or the angle got too steep during auto leveling. | Check that the controller is mounted tight. |
| Excessive Angle | The controller is not secured, or the angle got too steep during manual operation. | Check that the controller is mounted tight. |
| Feature Disabled | Auto Level or Hitch Recognition cannot run right now. | Press FRONT to raise the trailer to hitch height and hook up. |
| Low Voltage | Battery voltage dropped below 9.5 volts. | Charge the battery and test it under load. |
| Out of Stroke | A jack reached full length and cannot lift. | Check how the jacks are sitting. |
| External Sensor | Bad connection or wiring between the controller and the rear sensor. | Check the rear remote sensor plug and wiring. |
| Jack Time Out | The auto operation took longer than its time limit. | Look for anything blocking a jack. |
| Auto Level Failure | Auto level stopped because of the controller or power. | Check that the controller is mounted tight. |
| Auto Level Fail | The system could not level the trailer. | Move the trailer to flatter ground. |
| Bad calibration | Sensor calibration values are out of range. | The manual says to replace the controller. Contact Lippert or a dealer. |
| Internal Sensor | The sensor inside the controller has a problem. | The manual says to replace the controller. Contact Lippert or a dealer. |
| Function Aborted | A button was pressed during an automatic run, so it stopped. | Restart the automatic run and do not press any buttons until it finishes. |
Source: Lippert Level-Up LCD 5th Wheel Troubleshooting Guide, CCD-0001749, Rev 08.06.18 (Forest River hosted copy) · Open in the lookup · RV slide-out troubleshooting
Lippert (LCI) Level-Up motorhome leveling error codes
Models: Level-Up motorhome hydraulic leveling (LCD touch pad)
When an error happens the LCD shows it and an alarm sounds. Normal functions stop. Press ENTER to reset the display.
Where it shows: Message on the touch pad LCD with an alarm
| Code | What it means | Check first |
|---|---|---|
| ****ERROR**** Excess Angle | The coach is not on level enough ground, or the zero point is set wrong. | Move the coach to more level ground before auto leveling. |
| ****ERROR**** External Sensor | The rear sensor is shorted or unplugged. | Check the sensor wire connection. |
| Out of Stroke | A jack does not have enough length to finish leveling. | Check how the jack is sitting. |
| Low Voltage | Battery voltage dropped below 9.5 volts during operation. | Start the engine. |
| Function Aborted | A button was pressed during Auto Level. | Press ENTER, then restart the procedure. |
| Unable to Finish Leveling | There was too much movement inside the coach during auto leveling. | Stay still inside the coach while it levels. |
| Engage Park Brake | The parking brake was not set before auto leveling. | Set the parking brake, then start auto leveling. |
| Comm Error / Check Wiring | The wiring between the touch pad and controller is loose or faulty. The screen will not light up. | Check the connections. |
| ****ERROR**** Retract Timeout / Return Levelers for Service | The jacks did not finish retracting in time. | Set the parking brake, then press ENTER and RETRACT together to clear. |
| Excessive Angle | In manual mode the coach angle got too steep. | Use the manual buttons to bring the coach back to a more level position. |
| EMERGENCY RETRACT | The system lost hydraulic pressure while driving and is pulling the jacks back up. An alarm sounds. | Look for fluid leaks at hoses, fittings, and jacks. |
Source: Lippert Level-Up Motorhome Leveling Troubleshooting Guide, CCD-0001751, Rev 08.06.18 (Forest River hosted copy) · Open in the lookup · RV slide-out troubleshooting
Lippert (LCI) SlimRack slide-out (auto controller) error codes
Models: SlimRack slide-out with auto-programmable controller 1510000236 / 366701 or 1510000276 / 366703 (rocker switch)
The green flashes show the motor and the red flashes show the fault. On major faults the controller goes into Emergency Jog mode, so you may need to press the switch many times to move the room.
Where it shows: Green and red LEDs flash on the controller. Some rocker switches also have a red fault LED
| Code | What it means | Check first |
|---|---|---|
| 1 green, 1 red | Minor fault. Parking brake not set. | Set the parking brake if your RV has this feature. |
| 1 green, 2 red | Minor fault. Low voltage. Input is below 12 volts, and the room will not move at 10.5 volts or less. | Start the engine or generator, or plug into shore power. |
| 1 green, 4 red | Major fault on motor 1. | Check the motor 1 plug at the controller. |
| 2 green, 4 red | Major fault on motor 2. | Check the motor 2 plug at the controller. |
| 1 green, 6 red | Minor fault. High voltage. Supply to the controller is 17 volts or more. | Have the RV's charging system checked. |
Source: Lippert SlimRack Slide-Out Owner's Manual, CCD-0001459, Rev 07.30.18 (Forest River hosted copy) · Open in the lookup · RV slide-out troubleshooting
Lippert (LCI) SlimRack slide-out (touchpad) error codes
Models: SlimRack slide-out with touchpad controller 1510000199 / 366697
Count the red flashes for the fault code and the green flashes for the motor number. Minor faults clear by pressing IN or OUT. Major faults clear with the SET STOPS/CLEAR FAULTS button on the back of the touchpad.
Where it shows: Red FAULT CODE LED flashes on the wall touchpad. The green ROOM MOVEMENT LED flashes to show which motor
| Code | What it means | Check first |
|---|---|---|
| 1 red flash | Major fault. The room stops are not programmed. | The stops must be programmed by an authorized service facility. |
| 2 red flashes | Minor fault. System fault from an obstruction or too much drag. | Run the room the other way. |
| 4 red flashes | Major fault. Motor fault on the motor shown by the green flashes. | Check all plugs at the controller and the motor. |
| 6 red flashes | Minor fault. Supply voltage to the controller is 17 volts or more. | Check voltage at the 2-pin power plug on the controller with a multimeter. |
| Park brake LED flashing | The parking brake signal is missing. | Set the parking brake if your RV has this feature. |
| Low voltage LED flashing | Voltage coming into the controller is below 12 volts. | Charge the battery or plug into shore power. |
Source: Lippert SlimRack Slide-Out Owner's Manual, CCD-0001459, Rev 07.30.18 (Forest River hosted copy) · Open in the lookup · RV slide-out troubleshooting
Smell propane or ammonia? Do not reset the appliance and try again. Turn it off, close the propane tank valve, air out the RV and call a tech.
Common questions
What does “no FL” mean on a Norcold RV fridge?
“no FL” means no flame: the propane burner did not light, or it lit and then went out. Check that the propane tank has gas and its valve is open, then light a stove burner to push air out of the line. Turn the fridge off and back on to make it try again. It shows on Norcold N64X/N84X, N1095, 1200-series, 1210/1211, 2117 and 2118 fridges. Our Norcold error code guide covers the fixes in detail.
What does code 36 mean on an Onan RV generator?
On Cummins Onan QG 2800, 4000, 5500 and 7000 gasoline generators and QD diesels, code 36 means the engine stopped on its own without a stop command. Running out of fuel is the first thing to check, because Cummins says the generator’s fuel pickup is usually set so the generator runs out before the engine does. On the newer inverter models (QG 2800i, 4000i and 7000i), code 36 means a different fault, so look up your exact model. See why an Onan generator keeps shutting off for the full checks.
What does E1 mean on a Dometic RV thermostat?
On Dometic single zone, CT touch and CCC 2 thermostats, E1 means the thermostat lost contact with the control board in the rooftop air conditioner. When all boards are lost, the system shuts down. On a CCC 2, the zone number that blinks shows which unit lost contact. Our Dometic thermostat error code guide walks through each code and the reset.
What do E4 and E7 mean on a Dometic thermostat?
E4 means the outdoor temperature sensor reads open or out of range. It only applies to some models: the heat pump locks out, but cooling and the furnace still work. On CCC 2 thermostats, E7 means none of the power module boards in the air conditioners are getting 120-volt power, so check shore power, the generator and the AC breakers.
What does E1 mean on an RV tankless water heater?
On Girard GSWH-2 and Furrion F2GWH tankless water heaters, E1 means the burner did not light, or the flame went out while lighting, and the heater locks out after two tries. Check that the propane tank has gas and its valve is open. On the Furrion 2.4 GPM models, E1 means no flame was sensed while the heater tried to light. See RV water heater won’t light for the checks.
Why does the same code mean different things on different RVs?
Each maker numbers its own faults. E3 on a Norcold N15DC 12-volt fridge means the voltage went too low or too high, while E3 on a Dometic thermostat means the indoor temperature sensor is shorted. Always look up the code for your brand and model, which you will find on the label of the appliance.
Where do I find the model number on an RV appliance?
Look for the rating label or nameplate on the appliance itself. On most RV fridges it is inside the fresh food compartment. On water heaters and furnaces it is usually behind the outside access door, and generators carry a nameplate on the housing. Write down the model and serial number before you look up a code or call for service.
How do I clear an RV error code?
Fix the cause first, then reset the appliance the way its manual says. Many clear when you turn the appliance off and back on, and some thermostats have their own reset steps, which the lookup shows when the manual gives them. If the same code comes back after the checks, write it down with the model and serial number before you call for service.