LG Air Conditioner Error Code CH62

CH62 means the outdoor unit's PCBA heat sink has exceeded its maximum allowable temperature. The control board monitors heat sink temperature to protect the inverter and power components from heat damage. When the threshold is exceeded, the system shuts down and displays CH62 until the root cause is corrected.

No, you should not continue operating the unit with an active CH62 error. The system has shut down automatically to protect the control board and inverter components from heat damage. Running the unit repeatedly under these conditions can permanently damage the PCBA, turning a straightforward repair into a costly board replacement.

If the fix involves clearing obstructions or tightening heat sink screws, the repair may cost nothing beyond a service call fee, which typically ranges from $75 to $150. A failed outdoor fan motor replacement generally runs between $150 and $400 including parts and labor. If the PCBA itself has been damaged by the overheating event, board replacement can range from $300 to $700 or more depending on the unit model.

Start by checking the outdoor unit for physical obstructions blocking airflow, including vegetation, fencing, or debris on the coil and filter. Confirm the outdoor fan is spinning freely and operating when the unit runs. If airflow appears normal, inspect the heat sink mounting screws on the outdoor control board and tighten any that are loose. If the fan motor is seized or the control board shows signs of damage, those components will need to be replaced.

A power reset may temporarily clear the fault and allow the unit to restart, but CH62 will return if the underlying cause is not resolved. The heat sink temperature fault is a protective response to a real condition, not a random glitch. Address the airflow, fan, or heat sink hardware issue first, then reset the unit.