Samsung Refrigerator Error Code R-DEFROSTING ERROR

This code means the control board has detected a problem in the refrigerator compartment defrost circuit. The fault can be an open or short circuit in the defrost heater, a blown temperature fuse or bi-metal thermostat, a failed wiring connector, or a defrost cycle that ran for more than 80 minutes without completing. The refrigerator will stop running defrost cycles, which leads to frost buildup on the evaporator coils over time.

Start by unplugging the refrigerator and disconnecting the defrost circuit connector from the PCB. Use a multimeter to check resistance across the defrost heater and across the temperature fuse and bi-metal thermostat separately. An open reading (OL) on the fuse indicates it has blown; an open reading on the heater means the element has failed. Replace whichever component tests faulty. If all components test within spec, inspect the connector itself for corrosion or bent pins and reseat or replace it.

Unplug the refrigerator, then remove the evaporator cover panel in the refrigerator compartment to access the defrost assembly. Disconnect the defrost connector from the PCB as the first step. Set your multimeter to the resistance (ohms) setting and probe the heater terminals directly. A functional heater typically reads between 20 and 100 ohms depending on the model; consult your specific model's service manual for the exact value. An OL reading confirms an open heater that needs replacement.

You can continue using it in the short term, but food safety becomes a risk as frost accumulates on the evaporator coils and restricts airflow. The refrigerator compartment will gradually lose its ability to maintain safe temperatures even though the compressor continues running. Address the fault within a few days to avoid spoilage and to prevent the frost buildup from causing additional damage.

A replacement defrost heater assembly typically costs $20-$60 in parts, and a temperature fuse or bi-metal thermostat runs $5-$20. If you are comfortable working with a multimeter and accessing the evaporator panel, this is a manageable DIY repair. Professional labor adds $100-$200 depending on your area, making the total $120-$260 for a service call. The job is worth attempting yourself if you can safely remove the evaporator cover and identify the faulty component.