Stephen G Crawfordsville , IN September 11, 2024 Appliance: Frigidaire Refrigerator FFTR2021TB8 Frigidaire Top-Mount Refrigerator Fftr2021tb8: Refrigerator temperature too warm freezer temp too warm. How to replace Defrost Timer. I replaced the cold control switch and also replaced the automatic defrost control timer that is located in the refrigerator. Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes