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Thread: Microwave keeps blowing the circuit breaker

  1. #1
    Join Date
    Dec 2010
    Location
    Palm Bay
    Posts
    1

    Default Microwave keeps blowing the circuit breaker

    Model Number: 721.80012401
    Brand: Sears Kenmore

    My Kenmore OTR microwave came with the house when we built it. During the 1st year it quit heating and the magnetron had to be replaced (free under warranty). The other night I went to heat something up and as soon as I hit start it blew the circuit breaker. I reset the circuit breaker, the fan, light, and clock all work fine. It only blows the circuit breaker once you hit the start button. We have had this unit now about 3 years. My wife and I were at Home Depot the other day just pricing new units to replace it, and one of the salesman said that it was the magentron over charging. Does this make sense? Any ideas what it may be, and if it is worth fixing?
    -Ed

  2. #2
    Join Date
    Oct 2004
    Location
    Ontario, Canada
    Posts
    14,167

    Default

    Hi,

    and one of the salesman said that it was the magentron over charging. Does this make sense?
    Nope.

    It only blows the circuit breaker once you hit the start button
    A copy that may help...

    Q - My microwave blows the fuse inside itself as soon as I push the start button.
    A - Usually a shorted high voltage capacitor...see components section.
    A copy and tip from Prashanth:
    Description of problem (Maytag CMV1100Q) :
    Microwave stopped working while cooking. Replaced a 20AMP fuse.
    When the cook cycle starts, microwave makes a groaning noise and stops. It loses power since the fuse is blown.
    Solution: High-voltage capacitor shorted. Replaced it and microwave works fine.
    Its located behind the fan underneath the high-voltage transformer.
    Remove the vent fan hood
    Remove the display control panel by removing the screw
    Take pictures of all the connections behind the control panel.
    Unhook all connections
    Remove the connections to fan
    Remove the fan
    Remove the screws and connections for interlocking switches.
    Make sure the high voltage capacitor is discharged!
    Remove the high voltage capacitor and replace
    Retrace the steps and put everything back.
    Microwave works great now.


    http://www.applianceaid.com/micro4.html


    jeff.
    http://www.applianceaid.com/
    Appliance Repair Aid

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