William M Minneapolis , MN June 13, 2015 Appliance: General Electric Refrigerator TFH22PRSAAA Ge Refrigerator Tfh22prsaaa: Freezer was frosting up and not staying cold same with the refrigerator. How to replace Refrigerator Defrost Heater. Not sure I did yet, I replaced the defrost heater. Super easy fix, found a video online. Defrosted the coils, removed the four screws holding the heaters in installed the new one. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes