Jeff S Hope , IN July 11, 2016 Microwave not working; would not heat Replaced Magnetron and diode. Fixed problem and microwave workso again. Very time consuming because of microwave/oven built-in combo. Not easy to get to parts that needed to be replaced. Still cheaper to repair than to replace. 45 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 2+ hours