LG Heat Pump Error Code P2

P2 indicates a SUMP COMP DOWN fault, meaning the condensate temperature at the compressor sump reached 95°C. The system counts each occurrence and shuts down after six detections to protect the compressor from heat-related damage. This is a thermal protection fault, not an electrical or communication error.

No, it is not safe to bypass or ignore the P2 fault. The system shuts down specifically to prevent the compressor from sustaining heat damage, and continuing to force operation without resolving the root cause can lead to compressor failure. Allow the unit to remain off and address the cause before restarting.

Repair costs depend on the cause. Cleaning the outdoor coil or clearing obstructions is low cost and may be handled as a DIY task or for a basic service call fee, typically in the range of $75 to $200. If the outdoor fan motor needs replacement, costs generally fall between $200 and $500 including parts and labor. A compressor replacement, the worst-case scenario, can range from $1,200 to $2,500 or more depending on the unit size and local labor rates.

Start by checking the outdoor unit for anything blocking airflow at the air inlet or outlet, such as debris, vegetation, or objects placed too close to the unit. Also inspect the outdoor coil fins for dirt buildup and verify the outdoor fan is spinning at full speed. If those checks pass, the system may need a refrigerant pressure check or further compressor diagnostics by a licensed HVAC technician.

A reset may temporarily clear the fault and allow the system to restart, but if the underlying cause such as restricted airflow or a dirty coil is not corrected, the system will detect the overheating condition again and shut down after another six occurrences. Resetting without diagnosing and fixing the cause will not resolve the problem.