LG Air Conditioner Error Code E364

E364 indicates an over-current fault on inverter compressor 2. The control system detected that the second compressor was drawing more current than the allowable limit and shut the unit down to protect the compressor and inverter hardware. This code is common in multi-compressor LG systems and requires electrical and refrigerant system diagnostics to resolve.

No. The E364 fault causes the system to shut down specifically to protect the compressor and inverter from damage caused by excessive current. Attempting to bypass or repeatedly reset the fault without addressing the underlying cause risks permanent compressor failure, inverter board damage, or an electrical hazard. The unit should remain off until a thorough inspection is completed.

Repair costs vary widely depending on the root cause. A simple wiring repair or sensor repositioning may cost between $75 and $200 for labor. Refrigerant recharge or leak repair typically runs $150 to $450. Inverter board replacement can range from $300 to $700 including parts and labor. Compressor replacement is the most expensive outcome, often ranging from $800 to $2,000 or more depending on the unit size and model.

Some basic checks, such as inspecting wiring connections and verifying sensor placement, can be done by a knowledgeable DIYer after powering the unit off. However, measuring compressor phase resistance, checking inverter output voltages, and evaluating refrigerant pressures require tools and skills typically held by a licensed HVAC technician. It is strongly recommended to have a professional complete the diagnosis before restarting the system.

A power reset may temporarily clear the E364 code, but if the underlying cause is not corrected, the fault will return, often quickly. Repeatedly resetting the unit without fixing the root problem can cause additional damage to the compressor and inverter components. A proper diagnosis should be completed before any reset is attempted.