Patrick B Bluffton , SC March 29, 2016 Appliance: Samsung Refrigerator RS261MDRS/XAA Samsung Refrigerator Rs261mdrs/Xaa / : Freezer was not defrosting. How to replace Refrigerator Temperature Sensor. Replaced the heater sheath and both temperature sensors 9 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes