LG Heat Pump Error Code P714

P714 indicates that the LG heat pump outdoor unit has entered a SUMP DOWN 2 protection control state. This means the system has detected conditions that suggest the compressor oil in the outdoor unit sump may be diluted with refrigerant, which can compromise lubrication. The unit activates this protection mode to prevent compressor damage. A qualified technician should evaluate the system to find and correct the root cause.

Continuing to operate the heat pump without addressing the P714 error is not advisable. The protection mode is designed to limit compressor damage, but if the underlying cause is not resolved, repeated triggering of this protection can degrade the compressor over time. Running the system in a degraded state risks a costly compressor failure. Have the unit inspected as soon as possible.

Repair costs vary widely depending on the cause. If the fix involves recharging refrigerant or replacing a crankcase heater, costs typically range from around $150 to $500 or more depending on labor rates and refrigerant type. If the compressor has already sustained damage due to lubrication failure, replacement costs can range from $800 to $2,500 or higher. Early diagnosis and repair is the best way to avoid the higher end of that range.

Some basic checks, such as inspecting for obvious issues or reviewing the unit's operating history, can be done by a homeowner. However, diagnosing and repairing the root cause typically requires checking refrigerant charge, testing the crankcase heater, and measuring system pressures, all of which require professional tools and EPA certification for refrigerant handling. It is strongly recommended to contact a certified HVAC technician for this error.

A simple power reset may temporarily clear the P714 code, but if the underlying cause is still present, the error will return. The SUMP DOWN 2 protection is triggered by actual system conditions, not a one-time sensor glitch. Resetting without diagnosing and correcting the root cause means the compressor continues to be at risk. A proper repair is needed to resolve the code permanently.