Question about Maytag MMC5000 Microwave Oven

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Whirpool Microwave My microwave just stop working,No power at all.I've opened it and found a blown fuse.I replaced the fuse w/ the same rating but when i power on the fuse blown again.I can't find any defective parts inside.Pls. help,I'm also a technician.Thank you very much.

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  • Renato Jardiolin Jan 06, 2007

    Ok,Thanks for the quick response.When i hit the start botton it runs for about 2 seconds then stops,no power at all,Fuse blown again.So the capacitor is defective.Is it worth if i changes the capacitor or
    i just buy a new microwave.BTW how much is the capacitor?Thank you..

  • Renato Jardiolin Jan 08, 2007

    Thank you for the response...

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You say when you "power on" the fuse blows? If that means when you hit the START button to cook, then you probably have a shorted high-voltage capacitor. If you mean it blows when you plug it in, you probably have a shorted door switch. Your microwave may also have a wiring diagram pasted on the inside of the outer wrapper or in an envelope. That will help in your tests.

Posted on Jan 05, 2007

  • William Miller
    William Miller Jan 06, 2007

    It's more likely to be your high-voltage transformer, but you seem qualified to do the diagnosis.

    Here's a good place to order the parts:http://tinyurl.com/gv383

  • William Miller
    William Miller Jan 08, 2007

    If the fuse blows immediately when you hit START, then it's the HV capacitor.

    Since you say it blows 2 seconds after you hit START, it's probably the HV transformer.

    To order parts and see exploded views, tryhttp://tinyurl.com/gv383

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