LG Refrigerator Error Code 86

Error code 86 indicates a compressor over-voltage error. The refrigerator's inverter board has detected that the AC input voltage exceeded 308V, or that one of the DCLINK sensing resistors (R514, R515, or R516) on the inverter board has shorted and is producing a false over-voltage reading. The compressor shuts down automatically to prevent damage to the inverter components.

The error itself means the refrigerator has already shut down the compressor as a protective measure, so immediate danger to the appliance is limited. However, if the underlying cause is a genuine over-voltage condition in your home's electrical supply, other appliances on the same circuit could also be at risk. Have your supply voltage checked promptly if the DCLINK resistors test normal.

Repair cost depends on the specific cause. Replacing individual DCLINK resistors is a low-cost component fix, though labor for inverter board rework adds to the total. A full inverter board replacement typically runs in the range of $150 to $400 or more for parts and labor, depending on the model and service rates in your area. If the issue is an actual supply voltage problem, an electrician may be needed as well.

Diagnosing this code requires measuring resistance on the inverter board and checking the AC supply voltage with a multimeter, both of which involve working near high-voltage components. Technicians comfortable with inverter board repair can test R514, R515, and R516 for short circuits. For most homeowners, this repair is best left to a qualified appliance technician due to the high voltages present on the inverter board.

A power reset may temporarily clear the code, but if the shorted resistor or over-voltage condition is still present, the error will return as soon as the compressor attempts to start. Resetting without addressing the root cause does not fix the underlying fault and can delay proper diagnosis while food safety is at risk.