LG HVAC Error Code 14

Error code 14 on an LG HVAC system indicates a Compressor Phase Amperage Error. The system has detected that the electrical current on one or more compressor phases is outside the acceptable operating range. The unit shuts down to prevent compressor damage. A technician should measure phase amperage and inspect the inverter board and compressor windings.

No, you should not attempt to bypass or continuously reset the system while this error is active. The fault is a protective shutdown designed to prevent catastrophic compressor failure. Running the unit with a phase amperage problem can cause overheating, winding burnout, or further damage to the inverter board, all of which significantly increase repair costs.

Repair costs depend heavily on the root cause. Fixing loose wiring or rebalancing power supply issues may cost between $75 and $200 for a service call. Inverter or power module board replacement typically ranges from $300 to $700 including parts and labor. Compressor replacement is the most expensive outcome, generally ranging from $1,000 to $2,500 or more depending on the unit size and system type.

Most causes of error code 14 require professional diagnosis involving live electrical measurements at the compressor and inverter board. Checking for loose or corroded wiring connections at the unit's power terminals is something a knowledgeable DIYer can safely do with the power off. However, compressor winding testing, inverter board replacement, and refrigerant system evaluation require a licensed technician.

A power reset may temporarily clear the error and allow the unit to restart, but if the underlying cause is not resolved, the fault will return, often quickly. Repeated resets without addressing the root cause can accelerate compressor or board damage. A proper diagnosis should be performed before relying on a reset as a solution.