At a Glance
LG makes it easy to diagnose problems with your air conditioner, should you run into any issues. If an issue occurs, the air conditioner is programmed to communicate diagnostic messages, displayed as codes, that can usually be resolved by performing a few troubleshooting steps.
Try This
Select your air conditioner below:
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Portable
Window
Through the Wall
Ductless/Split
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P2 or FL Error Code
The P2 or FL error code (depending on model) indicates that the drain pan in the unit is full.
Under normal operating conditions, the drain pan will not need to be emptied. The unit is designed with a slinger fan that is mounted above the drain pan. This fan picks up the water and slings it on to the condenser to help discharge heat. There is usually not enough water in the drain pan to cause the air conditioner to shut off.
Select the condition from the list below in which the P2 or FL error code displays:
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P2 or FL Displays and Keeps Coming Back
If the P2 or FL error code is displaying on the air conditioner, remove the drain port cap and tilt the air conditioner to the back so the water runs out of the drain outlet.
If the unit is in COOL mode and the P2 or FL error code keeps coming back, this indicates that the room is very humid and the unit is working well.
To drain the unit less frequently, turn the fan speed to LOW. This will slow the air circulation in the room and, thus, the amount of moisture the unit removes. Also, make sure all doors and windows are shut in order to create a controlled environment.
If the unit is in DRY mode, the unit is running primarily to remove moisture from the air. Change to the setting to COOL mode to reduce the amount of moisture being removed from the room. Some models may allow a hose to be connected for continuous drain. Refer to the model-specific owner's manual for details.
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P2 or FL Displays & No Water Drains Out
If the P2 or FL error code is displaying on the air conditioner, remove the drain port cap and tilt the air conditioner to the back so the water runs out of the drain outlet.
If no water is draining out when the air conditioner is tilted to the back, the unit will require a repair service. Please visit our Request a Repair page.
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P2 or FL Display Will Not Clear After Draining
If after tilting the unit to the back to drain the P2 or FL error code remains, perform a reset on the air conditioner.
To perform a reset:
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Unplug the air conditioner, leaving it unplugged for at least 10 seconds.
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Plug the air conditioner back in.
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Press the POWER button to turn the air conditioner back on.
If the P2 or FL error code appears after performing a reset. The unit will require a repair service. Please visit our Request a Repair page.
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P2 or FL Displays & Unit Does Not Shut Off
If the P2 or FL error code appears on the air conditioner's display but the unit continues to run. The unit will require a repair service, please visit our Request a Repair page.
CH34
The CH34 error code indicates the SAFETY RELAY powered down the unit due to abnormal pressure in the sealed system.
THIS IS NOT A DEFECT, but designed to protect the unit from overheating.
To reduce the risk of overheating, follow the steps below:
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Install an awning over the air conditioner to shade the unit from direct sunlight and weather conditions.
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Clean the condenser coils regularly to maintain proper airflow.
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Instead of shutting the air conditioner completely off when away, raise the temperature to a higher setting. This will allow the air conditioner to maintain better cooling and humidity control while reducing the strain on the unit when the temperature is turned back down for more cooling.
If the error code reappears, the unit will require a repair service. Please visit our Request a Repair page for further assistance.
CH02/E1
- A CH02 or E1 error code is an AUTO-STOP PROTECTION indicating a short or open circuit in the indoor pipe sensor.
- Try unplugging the unit and waiting 2 minutes for the power to discharge. Then plug the unit back in.
If the error code reappears, the unit will require a repair service. Please visit our Request a Repair page for further assistance.
CH01 or E2
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A CH01 or E2 error code is an AUTO-STOP PROTECTION indicating a short or open circuit in the indoor pipe sensor.
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Unfortunately, there is not any troubleshooting to resolve this error.
The unit will require a repair service. Please visit our Request a Repair page for further assistance.
CH03/E3
The CH03 or E3 error code indicates the unit has detected there is no refrigerant.
The unit will require a repair service for refrigerant to be added, please visit Request a Repair page for further assistance.
E4
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E4 indicates the air conditioner has entered defrost mode.
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This occurs when the unit detects ice on the evaporator which is located behind the front grille.
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Once defrosted, the air conditioner will resume normal operation.
If the error code reappears, the unit will require a repair service. Please visit our Request a Repair page for further assistance.
E5
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E5 indicates the water collection tank is full.
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To drain, remove and leave the bottom drain cap off long enough to allow any residual water to drain out.
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Once the water tank is completely drained and no more flows out, reinstall the cap and the unit should return to normal operation.
If the error code reappears, the unit will require a repair service. Please visit our Request a Repair page for further assistance.
F1/F2/F3
The unit is in FAN mode and the number shown is the set fan speed.
This is normal operation. The air conditioner is working properly.
CH05
A CH05 error code indicates a communication error between the outdoor and indoor unit causing the indoor unit to not receive a signal from the outdoor unit.
Unfortunately, the only way to resolve the CH05 error code is with repair service, please visit our Request a Repair page for further assistance.
CH30
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A CH30 error code indicates voltage going to the unit is too low for proper operation.
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This is not a defect, but an indicator of improper voltage from the outlet.
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A certified electrician is required to have this issue resolved.
If the error code reappears, the unit will require a repair service. Please visit our Request a Repair page for further assistance.
Not Listed
If the error codes on your unit is not listed, a service technician will be required for a proper diagnosis.
Please visit our Request a Repair page for further assistance.
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If you need information about a split unit or duct free air conditioner, they are considered business units, please visit lghvac.com/contact-us/ for further support.
