LG Heat Pump Error Code CH62

CH62 indicates that the heat sink temperature on the outdoor inverter module reached the protection threshold of 85°C and the unit shut down to prevent damage. The heat sink is attached to the power electronics that control compressor speed. The fault can be caused by airflow restrictions, a failed fan, low refrigerant, or a faulty temperature sensor. A technician should inspect the outdoor unit before restarting the system.

No. The unit has already shut down automatically to protect the inverter electronics from heat damage. Attempting to force the system to run while the underlying cause is still present risks permanent damage to the IPM or inverter board. The system should remain off until the cause is diagnosed and corrected.

Repair costs vary widely depending on the cause. Cleaning the condenser coil is a relatively low-cost service call, while replacing a fan motor typically runs in the range of $150 to $450 including parts and labor. If refrigerant needs to be recovered and recharged, costs generally fall between $200 and $600 depending on refrigerant type and the amount needed. Replacing the heat sink NTC sensor is usually on the lower end of repair costs, often $75 to $200.

Some causes, like cleaning a blocked condenser coil or clearing debris from around the outdoor unit, can be addressed without professional help. However, diagnosing a locked fan motor, checking refrigerant charge, or testing the heat sink sensor voltage and resistance requires proper tools and training. Refrigerant work in particular is regulated and must be performed by a certified technician.

A power reset may temporarily clear the fault and allow the unit to restart, but if the root cause is not addressed, the heat sink will overheat again and CH62 will return. Repeated cycling through this fault without repair can eventually cause permanent damage to the inverter components. A reset should only be performed after the underlying issue has been identified and corrected.