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Microwave oven died.

This is a four-year old GE microwave (hangs from a cabinet). Really dead. But power is coming to the outlet. I know there is no reset button, but is there a fuse that can be replaced or other part that I could do on my own? Or do I need a professional or even a new microwave?

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  • Anonymous May 18, 2008

    I saw a spark inside the microwave oven, then lost all power. Is it an internal fuse that needs replacing? I have already replaced the magnatrons.
    Can a new fuse be sent to me?

    John Coutts

  • Anonymous May 19, 2008

    I have replace a fuse on the touch-control pannel and immediately the fan stops functioning and oven is not working. Its a two months old machine... the control display is working but no rotation and cooking inside is happening. please help...

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  • Microwave Ovens Master
  • 8,820 Answers

A microwave can be dead for many reasons.

If the fuse is good, it may be an open thermostat or thermal cutout / thermal fuse on or near the magnetron or on top of the cavity / body of the oven.

If it goes dead for a while during or after cooking then comes back on, the magnetron is probably overheating and causing the magnetron thermostat to open. Then when it cools, it closes the circuit and allows power through again.

When checking thermostats, if it has a hood fan thermostat, that should read open, as opposed to the others, which should read closed.

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 when you plug it in or open or close the door, then there's a problem with a door switch or door switch mount.

If it's intermittent or random, it may be a bad connection, usually on the control board or a loose fuse holder, or even an intermittent fuse.

You should do a continuity test on the fuse while it's in the holder (with the microwave unplugged, of course) then turn the fuse by hand or take it out and put it back in, then test it again.

If you remove the fuse, then press the meter leads against the ends, it can allow internal contact to be made and make a bad fuse appear to be good.

If you or someone you know decide to look into it, we have critical safety information and disassembly information at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk

For most GE models, you can usually find helpful exploded view diagrams and order parts by entering your full model number here: http://tinyurl.com/gv383

There should also be a "mini-manual" hidden inside the unit behind the control panel, which is very helpful when troubleshooting.

Please feel free to contact me directly if you need more help.

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

William E. Miller, AS-EET
prototech@usa.net
http://www.microwavedisplay.com

Posted on May 22, 2008

  • William Miller
    William Miller May 22, 2008

    Clarification: The "mini-manual" may be hidden inside the unit behind the control panel or hidden on the left side behind the grille.

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