ErrorCodeDoctor
LG Air Conditioner CH02 error code
The CH02 error is an auto-stop protection error on LG air conditioners that indicates a fault in the indoor pipe temperature sensor circuit. It may also appear as E1 on some models. Unplugging the unit and waiting 2 minutes sometimes clears a temporary glitch. If the error comes back after resetting the sensor or its wiring needs professional replacement.
Common causes
- Short or open circuit in the indoor pipe temperature sensor
- Wiring to the sensor is loose or damaged
- Indoor pipe sensor has malfunctioned or failed
How to fix it
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1
Unplug the unit and wait at least 2 minutes to allow the power to fully discharge
-
2
Plug the unit back in and check if the error has cleared
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3
If CH02 or E1 returns after resetting contact a technician for sensor inspection and replacement
Related LG Air Conditioner error codes
CH02 error — frequently asked questions
What does the CH02 error mean on a LG air conditioner?
A short or open circuit was detected in the indoor pipe sensor
What causes the CH02 error?
The CH02 error is usually caused by: Short or open circuit in the indoor pipe temperature sensor; Wiring to the sensor is loose or damaged; Indoor pipe sensor has malfunctioned or failed.
Can I fix the CH02 error myself?
This is rated a hard fix — it often requires tools, parts, or experience, and may be safer left to a professional technician.
How much does it cost to fix the CH02 error?
Fixing the CH02 error on a LG air conditioner typically costs $80–$200, depending on parts and whether you do it yourself or hire a technician.
Is it safe to keep using my air conditioner with the CH02 error?
We'd recommend addressing the CH02 error before continuing to use the air conditioner, since hard-rated issues often involve a real fault rather than a minor glitch.