LG window air conditioner error codes
These error code explanations can help you diagnose a problem with your LG window air conditioner. For repair how-to help, visit the PartsDirect repair help section, which includes repair help for window air conditioners, major appliances, lawn and garden equipment, garage door openers, vacuum cleaners and more. Search for your model number to find a complete list of replacement parts for your window air conditioner.
Temperature sensor failure
Unplug the air conditioner and check the wire harness connections on the electronic control board. Examine the electronic control board for damage. Check for a pinched or broken wire in the temperature sensor wire harness. Replace the temperature sensor if it's defective.
Failure in the indoor temperature sensor
Unplug the air conditioner and check the wire harness connections on the electronic control board. Examine the electronic control board for damage. Check for a pinched or broken wire in the indoor temperature sensor wire harness. Replace the indoor temperature sensor if it's defective.
Abnormal operation protection error
Unplug the air conditioner and check the wire harness connections on the electronic control board. Examine the electronic control board for damage. Check for a pinched or broken wire in the indoor temperature sensor wire harness. Replace the indoor temperature sensor if it's defective.
Abnormal operation protection error
Clean or replace filters if dirty. Unplug the window air conditioner and check all components for visible damage. Check fan blades for damage or obstructions and replace any damaged fan blades. Check all wire harness connections. Replace any damaged wire harnesses.
Air conditioner is in the defrost mode
After the air conditioner exits defrost mode and resumes normal operation, check the unit to see if it's cooling properly. If so, then the E4 code is normal. If the portable air conditioner frequently goes into the defrost mode and isn't cooling properly, check the air filters and clean or replace filters if dirty.
Water collection tank is full
Empty the water collection tank. If the P2 or FL code appears when the tank is empty, replace the float switch or sensor in the collection tank.
Symptoms for window air conditioners
Choose a symptom to see related window air conditioner repairs.
Main causes: lack of electrical power, bad electronic control board, wiring failure, bad temperature sensor…
Main causes: clogged drain hole, air conditioner not leveled properly…
Main causes: dirty air filter, air conditioner is too small for the room, temperature set too cold, control failure…
Main causes: bad compressor, lack of refrigerant, bad compressor start relay, electronic control board failure…
Main causes: turning the air conditioner off and the back on too quickly, dirty or restricted condenser coil, compressor…
Main causes: clogged condensate drain, air conditioner not leveled properly, leaky window air seals …
Repair guides for window air conditioners
These step-by-step repair guides will help you safely fix what’s broken on your window air conditioner.
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How to replace a window air conditioner condenser fan
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Effective articles & videos to help repair your room air conditioners
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