Samsung Refrigerator Error Code FRIDGE-DEFROST-FUNCTION ERROR

This error means the refrigerator's fridge compartment defrost cycle ran continuously for more than 80 minutes without completing normally. The control board flags this as a defrost heater circuit failure. Possible causes include a blown thermal fuse, broken wiring, corroded contacts, heater housing separation, or a shorted heater element. A resistance test on the defrost circuit is the first step to identify the specific fault.

It is not recommended to continue using the refrigerator without addressing this error. A non-functional defrost system will allow frost to accumulate on the evaporator coils over time, eventually blocking airflow and causing the fridge compartment to lose its ability to maintain safe food storage temperatures. Additionally, a shorted heater element presents a potential electrical concern that should be inspected promptly.

A reset may temporarily clear the error code from the display, but it will not fix the underlying hardware fault in the defrost circuit. If the heater, bimetal thermostat, thermal fuse, or wiring is faulty, the defrost cycle will fail again and the error will return. A proper resistance test of the defrost circuit is needed to identify and correct the actual cause before the error will stay cleared.

Some causes, such as a loose connector or corroded contact, can be addressed by a knowledgeable DIYer who is comfortable working inside a refrigerator. However, accurately diagnosing the fault requires a multimeter and knowledge of how to safely disconnect the main PCB connector and measure resistance in the heater circuit. If the reading points to a failed bimetal thermostat, thermal fuse, or heater element, replacing those parts requires disassembling the evaporator cover inside the fridge compartment, which is more involved work.

Repair costs depend on the failed component and whether you use a professional technician or do it yourself. A bimetal thermostat or thermal fuse is typically an inexpensive part, with professional repair including labor generally ranging from $100 to $250. A full defrost heater assembly replacement with labor can range from $150 to $350 or more depending on your location and the specific model. Diagnosing the fault first before ordering parts helps avoid unnecessary costs.