LG Air Conditioner Error Code E485

E485 indicates an error related to the input current of Inverter 1 on your LG air conditioner. The system has detected an abnormal current condition at the inverter PCB, which controls compressor speed. The unit shuts down automatically to protect the compressor and internal components from damage. Resolving this fault requires inspecting the power supply, wiring connections, and the inverter PCB itself.

No, you should not attempt to run the unit while E485 is active. The fault indicates a problem with inverter input current that could damage the compressor, the inverter PCB, or other electrical components if ignored. The system has already shut down as a protective measure, and continued attempts to operate it without resolving the fault can lead to more costly repairs.

Powering off the unit and restoring power is the recommended first step and may temporarily clear the error if it was triggered by a transient power event. However, if the underlying cause is a failing inverter PCB or a persistent power supply issue, the error will return after reset. A reset alone is not a fix and the root cause must be identified and corrected to prevent the fault from recurring.

The initial step of powering off the unit and checking that the power connections are secure is something a careful homeowner can perform. However, working on the inverter PCB involves potentially dangerous stored electrical charge in capacitors, and diagnosing or replacing the board is best handled by a qualified technician. If connections appear secure and the error returns after a power cycle, a professional should assess and replace the inverter PCB.

Repair costs vary depending on the root cause. If the fix involves tightening connections or addressing a power supply issue, labor costs alone may range from around $75 to $150. If the inverter PCB requires replacement, parts and labor combined can range from $250 to $600 or more depending on the specific unit model and local labor rates.