LG Heat Pump Error Code Ch

Ch on an LG heat pump indicates that the crank case heater (CCH) is preheating the compressor. This is a normal protective status, not a fault code. The system is preventing the compressor from starting until refrigerant that may have collected in the oil sump is safely vaporized. The process can take up to 2.5 hours.

Yes, it is safe. The Ch code means the unit is in a controlled standby state and is operating as designed. The control board is simply preventing the compressor from running until preheating is done, which protects the compressor from damage. The unit will begin normal operation automatically when the cycle completes.

If the Ch code clears on its own within 2.5 hours, there is no repair cost. If a failed crank case heater element is the cause, part and labor costs typically range from $100 to $300 depending on the model and local labor rates. A control board replacement, if needed, can range from $200 to $600 or more including labor.

In most cases, no fix is needed. Simply allow the unit to complete its preheating cycle, which can take up to 2.5 hours. If the Ch code persists beyond that timeframe, a technician should check the crank case heater element for continuity, inspect the wiring connections, and evaluate the control board to determine why the cycle has not completed.

Resetting the unit by cycling power will not skip the preheating cycle; it will actually restart it from the beginning. This means the Ch code will continue to display and the wait time resets to up to 2.5 hours. It is best to leave the unit powered and allow the preheating to complete on its own.