Hunter H Gurley , AL August 09, 2021 Appliance: KitchenAid Microwave Hood Combo KHMC1857WSS0 Kitchenaid Microwave Khmc1857wss0: The microwave did not heat food. How to replace Magnetron. New magnetron and diode installed. Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours