Deborah L Sullivan , MO June 12, 2015 Appliance: Samsung Refrigerator RS265LBWP/XAA-0000 Samsung Refrigerator Rs265lbwp/Xaa-0000 / : Fridge kept getting warmer found evaporator fully covered over in ice. How to replace Refrigerator Water Tank Heater. I TOOK A CONTINUITY READING ON DEFROST HEATER AND FOUND CIRCUIT WSA OPEN.REPLACED WITH NEW ONE AND SO FAR WORKING FINE 2 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes