John R Jefferson City , MO April 14, 2017 Appliance: Samsung Refrigerator RF217ACPN/XAA Samsung Refrigerator Rf217acpn/Xaa / : Water and ice in the lower part of fridge. How to replace Refrigerator Temperature Sensor. I put a defrost sensor and a heater in as well as a new clip for the drain so it would not ice up. If you do this repair put all the parts in, that fixed it. 5 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes