LG Heat Pump Error Code P710

The P710 code means the heat pump has shut down the compressor because the low pressure sensor detected refrigerant pressure below the safe operating threshold. This is a protective function designed to prevent compressor damage. The most common causes include closed service valves, a refrigerant leak, or a clogged electronic expansion valve. A technician should inspect the system before attempting to restart.

No. The P710 shutdown is a protective measure, and attempting to bypass or repeatedly reset the system without addressing the underlying cause can result in serious compressor damage. Compressor replacement is significantly more expensive than repairing the root cause, so the unit should remain off until the issue is properly diagnosed and corrected.

Resetting the unit may temporarily clear the P710 code and allow the system to restart, but the error will return if the underlying cause has not been resolved. Repeatedly resetting the system while the low-pressure condition persists risks compressor damage. A full diagnostic inspection should be completed before relying on the unit again.

Some basic checks, such as confirming that the service valves are fully open, can be done without special tools. However, diagnosing and repairing a refrigerant shortage, a faulty EEV, or a defective pressure sensor requires manifold gauges, EPA refrigerant handling certification, and technical knowledge of the system. Most homeowners should contact a qualified HVAC technician for this repair.

Repair cost depends on the root cause. If the issue is simply closed service valves, cost is minimal, typically just a service call fee in the range of $75 to $150. A refrigerant leak repair and recharge can range from $200 to $600 or more depending on leak location and refrigerant quantity. An EEV replacement or low pressure sensor replacement generally falls in the $150 to $400 range for parts and labor.