LG Air Conditioner Error Code E465

E465 is a V-limit error for inverter compressor 1. The control system detected that the voltage operating range of the inverter-driven compressor has gone outside acceptable boundaries. The unit shuts down as a protective measure to prevent damage to the compressor or the inverter board.

No. The unit has shut down the compressor as a protective measure, meaning it will not cool effectively. Even if the unit appears to partially restart, running it repeatedly while the E465 fault is active risks permanent damage to the inverter board or the compressor, which are among the most expensive components in the system. Do not bypass the fault or force restarts until the root cause is identified.

A power reset may temporarily clear the E465 code and allow the unit to attempt a restart, but the fault will return if the underlying cause has not been fixed. The V-limit protection exists to prevent component damage, so repeatedly resetting and restarting without diagnosing the root cause can worsen the failure and turn a board-level repair into a full compressor replacement.

Start by checking the incoming supply voltage at the outdoor unit to confirm it is within the rated range on the nameplate. Next, inspect all wiring connections between the inverter PCB and compressor 1 for corrosion or looseness. If power supply and connections are good, the inverter board or the compressor itself will need to be tested for output voltage accuracy and winding resistance. Replacing a faulty inverter board is within reach for a skilled technician, but compressor replacement requires EPA-certified refrigerant handling and is best handled by a licensed HVAC technician.

Cost depends on the failed component. If the issue is a loose connection or out-of-spec supply voltage, repair costs may be limited to a service call fee and any electrical work needed. An inverter PCB replacement typically runs between $200 and $600 including parts and labor. If the compressor itself has failed, replacement costs range from $800 to over $2,000 depending on unit size and refrigerant type, and at that cost point, comparing repair cost to unit age and replacement value is worth doing.