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Error Code
The CH0 error code on your LG air conditioning unit indicates a communication error between the indoor and outdoor units. This prevents the system from functioning properly.
If the wiring between the indoor and outdoor units is loose or damaged, it can cause communication failure.
The Printed Circuit Board (PCB) in either the indoor or outdoor unit may be malfunctioning.
Voltage fluctuations or power surges can interfere with communication between the units.
Turn off the unit for 5–10 minutes, then turn it back on to reset the communication.
Check the wiring between the indoor and outdoor units for any loose or damaged connections.
If communication issues persist, the PCB may need to be inspected and replaced by a technician.
