LG Heat Pump Error Code P1

The P1 code means the compressor's COND sensor detected a condensate temperature of 67°C or higher six times within one hour, causing the system to shut down as a protective measure. This indicates that heat is not being properly rejected at the outdoor unit. The system will not resume normal operation until the underlying cause is corrected and the fault is cleared.

No. The P1 code results in a full system shutdown, meaning the heat pump will not operate while the fault is active. Attempting to force continuous operation without addressing the overheating condition could cause compressor damage, which is a significantly more expensive repair. Allow the system to cool and investigate the cause before attempting to restart.

Repair costs vary widely depending on the cause. Clearing debris and cleaning the coil may cost little to nothing if done yourself, or $75 to $200 if a technician performs a maintenance visit. Replacing a faulty fan motor or capacitor typically runs $150 to $450 in parts and labor. If a refrigerant recharge or sensor replacement is needed, expect costs in the $200 to $600 range depending on refrigerant type, regional rates, and the extent of any leak repair required.

Some causes of the P1 code are DIY-friendly, particularly checking for and removing physical obstructions around the outdoor unit and cleaning a dirty outdoor coil. However, diagnosing a failed fan motor, checking refrigerant charge, or replacing a COND sensor requires technical knowledge and, in the case of refrigerant, licensed equipment. Start with the airflow and coil inspection, and call a technician if those steps do not resolve the fault.

A power reset may clear the active fault and allow the system to restart, but if the root cause is not corrected, the system will detect six more high-temperature events within an hour and shut down again. A reset is useful for confirming whether the issue is intermittent or persistent, but it is not a solution on its own. Address the airflow, coil, fan, and refrigerant conditions before relying on a reset.