Question about Panasonic NN-H275 Microwave Oven

2 Answers

Keeps blowing fuses

Microwave blew the internal fuse, replaced it and everything works fine until you use the microwave and it blows the fuse again.

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  • smclunk Nov 09, 2008

    it is an NN-H275. it blows the fuse immediately after pressing start.

  • j_mel Apr 18, 2009

    I have the same problem. In my case we were boiling water on the stove and when we went to microwave some frozen vegetables the microwave went dead as soon as the start button was pushed. There was a lot of condensation under the microwave which could have been on the circuit board as well. I also replaced the fuse and the display will power up and all the lights and fan functions work. But when you try to microwave anything the fuse blows immediately.

  • William Miller
    William Miller May 11, 2010

    If it went dead almost immediately after pressing the Start pad, that's usually a shorted high-voltage capacitor.

    If it went dead a few seconds after pressing the Start pad, that's usually a failing high-voltage transformer.

    If
    it goes dead or blows the breaker (or GFI) when you plug it in or open or close
    the door, then there's a problem with a door switch or door switch
    mount.

    Does either situation describe yours?

    Do you have the model number?


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This problem is just like my own microwave, replace the shorted HV capacitor

Posted on Jul 27, 2009

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  • Panasonic Master
  • 8,820 Answers

If it went dead almost immediately after pressing the Start pad, that's usually a shorted high-voltage capacitor.

Here is a link you or someone you know can use to test it, but please read the safety info:
http://www.gallawa.com/microtech/cap_test.html

You can order Panasonic parts from Tritronics here or by calling 866-779-5835, but if you don't find what you're looking for there, try here.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Posted on Nov 09, 2008

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