LG Heat Pump Error Code P706

P706 is an outdoor unit overload 3 protection control error on LG heat pumps. It means the system has detected that the outdoor unit is operating beyond its safe load limits and has shut down to prevent damage. The protection circuit monitors compressor current, pressures, and related parameters, and triggers this code when those thresholds are exceeded. A qualified technician should diagnose the underlying cause before restarting the system.

No, you should not attempt to bypass or continuously reset the system while P706 is active. The overload protection circuit exists specifically to prevent compressor failure, which is one of the most expensive repairs on a heat pump. Continuing to force the system to run without addressing the underlying cause risks permanent compressor damage and potentially a complete outdoor unit replacement.

Repair costs vary widely depending on the cause. A refrigerant recharge or capacitor replacement typically falls in the range of $150 to $450. If the compressor itself has failed, replacement costs can range from $800 to $2,500 or more depending on the unit size and labor rates in your area. Getting a diagnostic service call first, usually $75 to $150, is the best way to get an accurate repair estimate.

Some preliminary checks are within reach of a knowledgeable homeowner, such as verifying the outdoor unit has adequate clearance, clearing debris from around the coil, and ensuring the outdoor disconnect is fully seated. However, the root causes of P706 often involve refrigerant levels, compressor amperage measurement, or capacitor testing, all of which require specialized tools and, in the case of refrigerant work, EPA certification. It is best to have a licensed HVAC technician perform a full diagnosis.

A power reset may temporarily clear the P706 code, but if the underlying cause is still present, the error will return once the system attempts to restart and encounters the same overload condition. Resetting without diagnosis is not a solution and can accelerate wear on the compressor. The fault should be properly diagnosed and repaired before returning the system to service.