David D Sherman , TX July 08, 2014 Appliance: General Electric Refrigerator TFS26PPDABS Ge Refrigerator Tfs26ppdabs: The defrost timer was defective. How to replace Refrigerator Defrost Timer. Got on AppliancePartsPros.com and they had the exact part number. Ordered part on Friday via second day shipping and I got the part on Monday. Finally I did not have to manually turn the switch on the timer every so many hours to defrost the refrigerator. Thanks to the Pros my refrigerator is defrosting itself now... Easy to look up part and model numbers with their system. Excellent. 11 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes