Question about Kenmore 62622 Microwave Oven

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Kenmore microwave making loud buzzing sound.

Kenmore 721.62469200 model microwave, makes buzzing sound when running, turned off asap. Removed cover, tested unit, saw a flash in the area of the magnatron, when it buzzed, only let buzz 1-3 seconds. Capacitor did not check shorted, but, my meter only goes to a 1000 ohms. Magnatron also did not check shorted to ground, shorted pin to pin. Diode checked open both ways need to get another meter for better test. Could diode or capacitor cause the buzzing sound or do I need to get a magnatron. Thanks Frank

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  • sg788fg Mar 06, 2009

    Problelm was daughter made a mess and cleaned out the microwave, When she did the cleaner ran behind the plate over the wave guide hole. Food was burnt on the plate causing the arcing sound. Thanks for the information it was a great help. Frank

  • William Miller
    William Miller May 11, 2010

    Chances are it is grease or food debris arcing on or behind the waveguide cover / stirrer cover, on the stirrer or in the waveguide.

    Or it may be that the stirrer is not turning.

    You can check that by removing the stirrer cover and running the oven a few seconds.

    Running it empty a few seconds is a good way to find where it might be arcing.

    Once you check all this, let us know what you find.

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Posted on Mar 06, 2009

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