Polar Refrigerator Error Code dc rE

The dc rE code on Polar N7LX and N8LX refrigerators means that relay K1 on the DC board has been detected in a stuck-closed position. This relay controls the DC heater circuit, and when stuck closed, it cannot interrupt power to the heater as required. The DC board assembly must be replaced to resolve this fault.

Continued operation with this error is not advisable. Because relay K1 is stuck closed, the defrost heater may run continuously without proper cycling control. This can lead to elevated temperatures in unintended areas of the unit and risks damaging other refrigerator components over time.

Repair costs depend on the price of the DC board assembly and whether you hire a technician. Parts costs for a control board on a commercial refrigerator like this typically range from roughly $150 to $400 or more depending on availability. Adding professional labor, the total repair cost could range from around $250 to $600 or higher depending on your location and service provider.

The required repair is replacement of the DC board assembly, which involves working with the refrigerator's internal electrical components. A knowledgeable DIYer comfortable with appliance disassembly and board replacement may be able to perform this repair, but if you are unsure about safely handling electrical components, a qualified technician is recommended.

A simple power reset will not clear the dc rE error because the fault is caused by a physically failed relay with fused contacts on the DC board. The relay's stuck-closed condition is a hardware failure that persists regardless of control system resets. The error will return until the DC board assembly is replaced.