LG Refrigerator Error Code 84E

The 84E code indicates a compressor under voltage error, meaning the inverter control system has detected that the voltage supplied to the compressor is below the required operating level. The refrigerator disables the compressor to prevent damage from running under low voltage conditions. Diagnosis should start with checking resistor R513 on the control board for a short or open condition.

No, the refrigerator's compressor will not run properly while this fault is active, meaning the unit cannot maintain safe food storage temperatures. You should remove perishable food and avoid relying on the refrigerator for food preservation until the fault is diagnosed and repaired.

Repair costs depend on the root cause. A board-level component repair such as replacing R513 may cost relatively little in parts, but labor to diagnose and perform board-level work can range from $100 to $300 or more. Replacing the full inverter control board typically runs between $150 and $400 including parts and labor, while compressor replacement represents the higher end of the repair cost spectrum.

Checking the household line voltage at the outlet is something a knowledgeable DIYer can do safely. However, testing and replacing resistor R513 or diagnosing the inverter board requires working with electronic components and board-level soldering, which is best handled by a technician with experience in appliance electronics. Improper handling of the inverter board can cause further damage.

A power reset by unplugging the unit for a few minutes may temporarily clear the code, but the fault will return if the underlying cause is not resolved. If R513 is shorted or open, or if there is a genuine voltage supply problem, the error will reappear once the compressor attempts to restart.