Without disassembling the over the range microwave. When it operates but will not cook is there a way to determine if its the transformer or even capacitor and Not the magnetron and diode that need to be replaced that you guys state in your repair videos for microwave not heating???
Main Power Relay off Control panel shows the voltage drop. As well as service cord with less than required Amperage.
- Guest asked 6 years ago
Hi. By checking the amp draw you can narrow things down. What was the amp draw of the unit when you checked it? If you get about 1 amp or lower your issue is on the low voltage side. This would be your door switches and control board. If you are getting about 3-4 amps or higher your issue is on the high side. This would include your magnatron, diode, transformer, and capacitor. 95% of the time if you are getting 3 amps or higher and the unit will not heat the issue is the magnatron. Always replace the diode with the magnatron. When I find bad capacitors they always trip the in line fuse. You could have a faulty transformer but they are not common. They usually put off a burning smell when faulty. Both a faulty magnatron and transformer can give a louder than usuall humming noise when running the unit as well.
- Brian, Ace Appliance answered 6 years ago
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