LG Air Conditioner Error Code E365

E365 indicates a voltage limit error on inverter compressor 2. The inverter drive circuit that controls the second compressor has detected voltage outside the acceptable operating range and has shut down to protect the compressor and electronics. This fault typically points to issues with the inverter PCB, incoming power quality, or the compressor itself.

No. The E365 fault is a protective shutdown, meaning the system has already stopped the compressor to prevent damage. Attempting to force the unit to operate with an unresolved voltage limit fault risks burning out the compressor 2 motor windings or permanently damaging the inverter board. The unit should remain off until the fault is diagnosed and corrected.

A power reset may temporarily clear the fault code and allow the unit to attempt to restart, but if the underlying cause is not resolved, the E365 error will return, often quickly. Repeatedly resetting the unit without fixing the root cause can worsen damage to the inverter board or compressor. A reset should only be used as part of a diagnostic process, not as a long-term fix.

Some basic checks, such as verifying supply voltage at the disconnect or inspecting wiring connections for obvious looseness or corrosion, can be done by a knowledgeable DIYer. However, safely diagnosing the inverter board, testing DC bus capacitors, and measuring compressor winding insulation resistance require proper tools and electrical training. Most homeowners should contact a qualified HVAC technician for this repair.

Repair costs vary significantly depending on the root cause. If the issue is a wiring connection or power supply problem, costs could range from roughly 100 to 300 dollars for a service call and labor. Replacing an inverter PCB typically falls in the range of 300 to 700 dollars including parts and labor. Compressor replacement is the most expensive scenario, often ranging from 800 to 2,000 dollars or more depending on the unit size.