Microwave not heating or cooking food? A failed magnetron is the likely cause. This high-voltage tube generates microwave energy for heating and cooking.
Do-It-Yourself Stories from Customers like You
Microwave stopped working, unit would run but food would not get hot Garry H. • Monmouth Beach , NJ • November 19, 2019
This was much easier than I expected. First and foremost discharge the capacitor, google has the instructions. The diagnosis was also easy, really just 3 parts, the Magnetron, the Capacitor, and the Diode. With a simple multimeter measuring the resistance I was able to determine the Magnetron had shorted out and the diode was bad. I replaced all three components which fixed my issue.
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