Robert A Merced , CA December 05, 2021 Appliance: Frigidaire Refrigerator FRT21C5AW6 Frigidaire Refrigerator Frt21c5aw6: Not cooling as it should. How to replace Defrost Heater (Evaporator). R&R "defrost heater". Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes