If the defrost sensor fuse blows, the defrost system will not work, and the refrigerator will not defrost. I'm pretty sure the defrost heater was the only faulty part, but I replaced the other parts to be safe. Defrost heater DA47-00424N melts frost from the evaporator fins during the automatic defrost cycle. Safely store any food that could deteriorate while the power is off. When the temperature drops, Samsung HVAC steps up and braves the elements. Wear work gloves to protect your hands. I know the defrost heater … With high heating performance at -13°F (-25°C), and versatile designs … When the going gets cold, Max Heat® gets going. This defrost heater (part number DA47-00424N) is for refrigerators. For Samsung. The defrost sensor has a fuse to back up the sensor in case the sensor fails. Replaced the defrost heater, Temp sensor, and defrost thermostat. In fact, depending on the model you are working on, Force Defrost will also activate other electric heaters … Original, high quality Samsung Refrigerator Defrost Heater, Icing Kit, Fountain Heater Parts and other parts in stock with fast shipping and award winning customer service. If the defrost sensor fails to shut off the defrost heater, the fuse will blow in order to shut off the defrost heater. Took me about 20 minutes start to finish. Appliance: Samsung Ref-Sxs RS2630SH/XAA My Repair & Advice. Unplug the refrigerator before installing this part. Buy today - ships today. Force Defrost, indicated as “Fd” on the seven-segment displays, activates the ice maker’s heater loop as well.