LG Air Conditioner Error Code E484

E484 indicates a PFC overload error, meaning the Power Factor Correction circuit in the inverter drive section has detected an overcurrent condition. This is a protective fault that shuts down the unit to prevent damage to inverter components and the compressor. The first diagnostic steps are to check the compressor input voltage and verify the overcurrent option setting in the system configuration.

No. The E484 fault is a protective shutdown, and the unit will generally not operate normally while the error is active. Attempting to force operation with an underlying overcurrent condition could cause further damage to the inverter board, the PFC components, or the compressor. The fault should be diagnosed and resolved before returning the unit to regular service.

Repair costs vary widely depending on the root cause. If the issue is a configuration setting or a supply voltage problem corrected externally, costs may be limited to a service call fee, typically in the range of $75 to $150. If the inverter board requires replacement, parts and labor can range from $300 to $700 or more. A compressor replacement is the most expensive scenario, often ranging from $800 to $1,800 depending on the unit size and model.

Basic checks such as confirming the supply voltage at the disconnect and inspecting the condenser for blockages can be done by a knowledgeable homeowner. However, diagnosing and repairing the inverter board, PFC circuit, or compressor involves high-voltage DC bus circuits that retain dangerous charge even after power is removed. These internal repairs should be performed only by a qualified HVAC technician with proper safety equipment.

A power reset may temporarily clear the error code and allow the unit to restart, but if the underlying cause such as abnormal supply voltage, a misconfigured overcurrent setting, or a failing component is not corrected, the E484 fault will return. A reset alone is not a repair, and repeated faults without diagnosis can lead to more serious component failure.