LG Heat Pump Error Code E472

E472 indicates an outdoor unit compression rate 2 error, meaning the heat pump has detected that the compressor is not achieving the expected pressure ratio between the suction and discharge sides of the refrigerant circuit. The system shuts down to prevent compressor damage. Common causes include low refrigerant, a refrigerant leak, a failing compressor, or a restricted component in the refrigerant circuit.

No, you should not continue operating the unit when E472 is active. The heat pump has already shut down as a protective measure, and attempting to force it to run could cause further damage to the compressor, which is one of the most expensive components in the system. Leave the unit off until a technician has diagnosed and resolved the underlying issue.

A power reset may temporarily clear the E472 code, but if the underlying cause such as low refrigerant, a refrigerant leak, or a compressor problem is not addressed, the error will return once the unit attempts to operate. Clearing the code without fixing the root cause can also risk additional compressor damage. A reset should only be used after a technician has diagnosed and repaired the fault.

Most causes of the E472 error require professional tools and certifications to repair properly. Diagnosing the fault accurately requires refrigerant manifold gauges, and any work involving refrigerant handling is regulated and must be performed by a licensed HVAC technician. Homeowners can check that the outdoor unit has good airflow and is free of debris, but the refrigerant circuit and compressor inspection should be left to a professional.

Repair costs vary significantly depending on the root cause. A refrigerant recharge after a leak repair can range from a few hundred dollars to over a thousand dollars depending on refrigerant type, leak location, and labor rates. Compressor replacement is the most expensive scenario, typically ranging from $1,000 to $2,500 or more including parts and labor. A service call for diagnosis alone generally costs between $75 and $150.