Pedro D Miami , FL January 08, 2020 Appliance: KitchenAid 30" Built-In Electric Double Oven Thermal Convection Lower Microwave Convection KEMC308KSS01 Kitchenaid Oven Kemc308kss01: Microwave not heating. How to replace Magnetron (Microwave). Replaced the Magnetron and Diode. Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours