LG Heat Pump Error Code CH32

CH32 means the discharge pipe temperature sensor has detected a temperature of 105°C or higher on the high-pressure refrigerant line exiting the compressor. The unit shuts down to prevent compressor damage. The fault points to either a system overload condition such as low refrigerant, a blocked condenser, or a failed outdoor fan, or a fault in the discharge temperature sensor itself.

No. The unit is designed to shut down when CH32 activates because sustained high discharge temperatures can cause serious compressor damage. Continuing to operate the system by repeatedly resetting it without correcting the fault risks destroying the compressor, which is the most expensive component in the system. Address the root cause before returning the unit to regular service.

Repair costs vary widely depending on the cause. Cleaning a blocked condenser is relatively inexpensive, typically in the range of $75 to $200 for a service call. Refrigerant leak repair and recharge can range from $200 to $600 or more depending on the severity of the leak and the refrigerant type. Replacing a discharge pipe temperature sensor generally falls in the $100 to $300 range including labor. Outdoor fan motor replacement typically runs $150 to $450 depending on the model.

Some causes, such as clearing debris from the outdoor condenser coil or confirming the outdoor fan is spinning, are tasks a homeowner can perform. However, diagnosing refrigerant leaks and recharging the system requires EPA certification and specialized equipment, so those repairs must be handled by a licensed technician. Sensor and wiring checks require a multimeter and knowledge of the correct specifications: 200k ohm resistance and 4.5Vdc at 25°C.

A power reset may temporarily clear the fault and allow the unit to restart, but if the underlying cause is not corrected the error will return, often quickly. Resetting is useful for confirming whether the fault is intermittent or persistent, but it is not a repair. If CH32 returns after a reset, a full diagnostic of the refrigerant charge, condenser airflow, outdoor fan, and sensor circuit is needed.