LG Air Conditioner Error Code CH34 Troubleshooting








My LG AC unit has a ch34 error. It stopped cooling properly and shows the error fault code CH34 on the display. The unit will run for a few minutes and then stop and display the error. What does error CH34 mean and how do I remedy the issue to clear the error code? My model number is LW8016ER. Please assist with troubleshooting my LG AC as it’s hot and the AC will not cool.

LG Room AC Air Conditioner Error Code CH34 TroubleshootingLG AC Error Code CH34 Troubleshooting & Help

Many error fault codes on room AC units can be fixed with a few simple troubleshooting steps. Follow the information below to understand and clear the error code on your LG AC unit.

LG AC CH34 Error Code = ABNORMAL PRESSURE/OVERHEATING
This error displays if the SAFETY RELAY powers the unit down due to ABNORMAL PRESSURE building within the sealed system. This feature is built into the unit to combat overheating issues. The unit is overheating and needs to be checked, see below for further troubleshooting procedures.

The AC is overheating, try the following to help reduce the risk of overheating:
Attempt a system reset by removing power for 10 minutes, then turn back ON.
Clean the condenser coils to regain optimum airflow.
Check the air filter on the unit for any sign of blockage, replace if needed.
Install an exterior drape or awning to shade the unit from the sun. (see image below)
Raise the temperature to a higher setting when away from the home.
(TIP – Do not turn the unit off when you leave home. Raise the temperature to lower the stress on the unit. This reduces the heavy strain on the AC unit while allowing it to maintain optimal cooling and humidity control.)



LG AC error CH34To clear error code CH34, install an awning
or shade the LG AC unit to reduce overheating.

Air conditioner making noises?
The AC is running normally when clicking, pinging, dripping, or the fan is heard:
The thermostat is heard clicking. This is normal: The compressor is simply starting and stopping.
The AC is making a ping sound. This is normal: Water is picked up by the condenser in high humidity.
Water dripping within the unit. This is normal: Water is collected in the pan during high humidity.
The fan can be heard running when compressor is quiet. This is a normal feature.

Need the manual for your LG Room Air Conditioner?
LG Room AC Service & Install Manuals
LG Manuals & Documents

Error Codes – Room Air Conditioner – LG
LG support – Most common error codes on room ac units
for error codes: P2 or FL, CH34, E1 or CH02, E2 or CH01, E3 or CH03, E4, E5, F1, F2, or F3.

LG Support – Use model number to find help
Enter your LG model number here for support

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LG AC CH34: Excessive pressure, check pressures, check the coil, make sure the air filters are clean. Check for OFN in system pipework.

Did this help you to clear the error code on your LG air conditioner? If you are still having problems, please let us know the model number of your AC and the issue you are having by filling out the form below. We will get back with you after investigating the issue and try to assist you to fix your AC. Please allow a day or so for us to respond.

ALLEN VETTER - DIY Repair Assistant
Allen is a Home Maintenance/Appliance tech and the author/creator of this website. He has 30 years of experience troubleshooting and repairing all types of machinery. Contact here



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