Keith N Ocala , FL May 09, 2016 Appliance: Frigidaire Refrigerator FRS26ZNHD3 Frigidaire Refrigerator Frs26znhd3: Coil icing up solid defrost heater defective. How to replace Defrost Timer. New heater, defrost t-stat and timer. Thanks for your installation demo. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours