Daniel H Kearny , AZ June 27, 2016 Appliance: General Electric Refrigerator TFX25ZPBEBB Ge Refrigerator Tfx25zpbebb: Freezing up on the evaporator coils in the freezer section. How to replace Defrost Timer. Replaced defrost timer and also changed out the condenser fan motor. All told it took 30 mins for both. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes