What common parts fail in GE microwaves?

Common parts that fail in GE microwaves include magnetron, door switches, and turntable motor, which account for most service calls. First, magnetron is most common part to fail after 5 to 7 years costing 50 to 100 dollars for part that generates microwaves that heat food, symptoms are microwave runs, light works, turntable turns, but food stays cold, magnetron failure often due to running microwave empty or food splatter on waveguide cover. Second, high voltage diode fails at 10 to 20 dollars that converts voltage for magnetron, causes not heating. Third, high voltage capacitor fails at 15 to 30 dollars that stores high voltage, causes not heating and can cause loud buzzing, capacitor stores lethal voltage even when unplugged, so discharge before testing. Fourth, door interlock switches fail at 10 to 20 dollars each, there are 3 switches that sense door closed, if one fails, microwave will not start or not heat as safety interlock prevents magnetron from energizing if door open. Fifth, turntable motor fails at 15 to 30 dollars located under bottom panel, causes turntable not turning and uneven heating. Sixth, turntable coupler cracks at 5 to 10 dollars that connects motor shaft to glass tray. Seventh, door latch hook breaks at 20 to 40 dollars from slamming door, causing door not closing. Eighth, membrane touchpad fails at 40 to 80 dollars from moisture and grease. To prevent failures, clean interior weekly and avoid slamming door.