LG Heat Pump Error Code P514

P514 indicates that the outdoor unit has activated its SUMP DOWN 2 protection control. This protection mode is triggered when the system detects that compressor sump conditions, such as refrigerant dilution of the lubricating oil, have reached a level that could cause compressor damage. The unit shuts down or restricts operation to protect the compressor until the condition is corrected.

No, you should not attempt to bypass or continuously reset the system to keep it running with this error active. The P514 protection exists specifically to prevent compressor damage, and operating the unit while the underlying condition persists can lead to compressor failure, which is a costly repair. Leave the unit off until a technician can diagnose and resolve the issue.

Repair costs vary depending on the cause. A crankcase heater replacement may cost between $150 and $400 including parts and labor. Refrigerant charge correction can range from $100 to $350 depending on the amount of refrigerant needed. If the compressor has already sustained damage or the control board requires replacement, costs can range from $600 to several thousand dollars. Getting a diagnostic visit from a certified technician is the best first step to determine the actual repair needed.

Some basic checks, such as verifying that the outdoor unit has power and inspecting visible wiring for damage, can be done by a homeowner. However, diagnosing and correcting the root cause typically requires checking refrigerant charge levels, testing the crankcase heater, and evaluating sensor outputs, all of which require professional tools and EPA certification to handle refrigerants. It is best to contact a certified HVAC technician for this repair.

A power reset may temporarily clear the fault code, but if the underlying sump condition has not been corrected, the P514 error will return, often quickly. Repeatedly resetting the unit without addressing the root cause risks damaging the compressor. A proper repair targeting the cause, such as replacing a failed crankcase heater or correcting the refrigerant charge, is needed for the code to stay cleared.