Richard B Erie , PA November 17, 2014 Appliance: Model GE - TBF18ZW Defrost timer not working on older (beer) fridge Ordered new timer and replaced. very easy. 2 screws, 4 wires with push on connectors. had to tip fridge back and put 2x4 under to make room to remove and replace timer took maybe 10 minutes 3 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes