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Microwave oven has become very noisy

This microwave is several years old and has recently become very noisy when operating. When the microwave is running it makes a very loud gravelly noise. I notice that when the oven is on high it makes the noise all the time, but on medium it goes off every so often, and on low it goes off even more often, so it sounds to me like the energy producing component. Can this be fixed? The turntable is not affected. Cooking takes place normally

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  • pret22 Feb 25, 2008

    The microwave is a Panasonic Model NN-6403BBPQ. It also has M type SS-672 on the model information sticker.
    Thanks for your assistance.

  • microwave7 Feb 26, 2008

    I have a Frigidaire Microwave Oven (model # PLMB209DC). It's about a year and a half old. When the microwave is running it makes a very loud noise. Can this be fixed? Nothing else is affected. Cooking takes place normally.

    Thank you!

    Alla

  • William Miller
    William Miller May 11, 2010

    Sounds like a bad magnetron, yes.

    If you'll give me your brand and model number I can give you:

    - More precise advice if you or a friend want to work on it.
    - Info on who to contact for repair service.

    Thanks.

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  • Microwave Ovens Master
  • 8,820 Answers

Oh, this is a UK/European model...

I have no info on that, so your best bet is to contact Panasonic UK:
http://www.panasonic.co.uk/customer-Support/index.asp


Good luck.

We're happy to help and we appreciate your thoughtful rating of our answer.

Posted on Feb 25, 2008

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If so, I would suspect a shorted high voltage diode ore a bad magnetron.


-.htmHere are some links you or someone you know can use for test help, but read
their safety warnings first:






line-height:normal">mso-fareast-font-family:"Times New Roman"">http://www.microtechfactoryservice.com/diode.html



line-height:normal">mso-fareast-font-family:"Times New Roman""> http://www.microtechfactoryservice.com/mag_test.html



line-height:normal">mso-fareast-font-family:"Times New Roman""> http://www.microtechfactoryservice.com/xformer.html





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We have the service manual and I have uploaded it to our site for you here.


-.htmPlease reply back here if you still need help.

We\'re happy to help and we appreciate your thoughtful
rating of our answer.

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