Alvin D Bethel , CT March 17, 2022 Appliance: Samsung Refrigerator RF20HFENBSR/AA-00 Samsung Refrigerator Rf20hfenbsr/Aa-00: Water leaking into refrigerator. How to replace Refrigerator Thermal Fuse Assembly. I replaced defrost sensor, the defrost heater and the defrost clip. 2 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 2+ hours