James I Marietta , GA February 25, 2021 Appliance: Model 318279621A The unit would not heat. Also the turntable and light won’t work. Previously fixed with door switch. Replaced door switch. This is the 2nd switch I replaced. Best to have small needle nose pliers to crimp wire contact. 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes