At a Glance
A CH05 error code on your air conditioner indicates a communication error between the outdoor and indoor unit.
Try This
Check if the circuit breaker for the outdoor unit is tripped.
1If the circuit breaker for the outdoor unit is tripped, turn off the circuit breaker for the indoor unit as well for 5 minutes.
2After 5 minutes, turn on both circuit breakers on at the same time and retry.
If the error code persists, service will be required. Please visit our LG HVAC page to locate a servicer in your area.
