Carmela H Loma Linda , CA May 29, 2015 Appliance: Samsung Refrigerator RF267AERS/XAA-0001 Samsung Refrigerator Rf267aers/Xaa-0001 / : Did not defrost completely. How to replace Refrigerator Temperature Thermistor. I replaced all three sensors behind the Defroster cover since I was not able to test them. Problem solved. 70 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 2+ hours