Edwin H Heber Springs , AR August 01, 2014 Appliance: General Electric Refrigerator TFF20VBB Ge Refrigerator Tff20vbb: Coils iced over. How to replace Heater & Brk Assembly. Looked up the make and model number on ApplianceParts.com. Viewed the diagram of the defroster heater assembly. Ordered the replacement parts which arrived in 2 business days. It took a long time with a hair dryer to melt the ice/frost on the coils, but not long at all to remove and replace the 2 heater elements. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 2+ hours