Gordon C Mercerville , NJ July 01, 2015 Appliance: Samsung Refrigerator RB215BSSB/XAA Defrost thermostat's & drain pan heater's Removed upper frig & lower freezer back evaporator covers to get to the frost buildup on the evaporator assembly. I then used a paint stripper heat gun to melt the ice build up caution should be used to keep the gun moving around as not to damage Wires,Eva,Sensor's. After 15 to 20 min of clearing frost I was ready to replace Drain Plate's & Thermal fuse's. When I had removed the old Defrost Thermal fuse's in the refrigerator & the freezer they looked different! They had an insulating foam wrapped around the new sensor's. So I called them (picked up n 2 rings) I spoke with Heather C. I asked her if the foam was to stay on or come off? She then asked me to send her a picture of the new part & old too.She responed via e-mail don't take off the foam. My Samsung is now up & running fine! Thank you for great the great service! Read More... 18 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes Tools: Screwdrivers