Question about Microwave Ovens

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Microwave oven not working model sharp R-38ST

When trying to use the microwave oven, the light comes on the microwavr turns around but no heat is produced, therefore doesnt cook the food.

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  • 5 more comments 
  • Anonymous Dec 14, 2007

    everythin works but no heat,I replace fuse blown.

  • chantellemcl Dec 26, 2007

    my microwave will allow you to set the cook time but when you press start the unit counts down the alloted time but doesnt cook . Yes it is on the cook setting not the timer.

  • Anonymous Apr 21, 2008

    microwave turns on although the it does not cook anything

  • Anonymous Apr 30, 2008

    Did changed the magnetron and capacitor is okay but first you turned 0n it work okay. Then tried again no heat. Pls. help what is the problem. This is a Sharp mocrowave oven model # R-408HS.

    Thanks.

    ed

  • Anonymous May 16, 2008

    I have a Sharp R-408HS 11000 Watts. Everything works in the command panel, however, when its ready to heat the food, the darn thing won't even start. Could it be a bad fuse?

  • Gainmel Nov 07, 2008

    I put a cup of water in the Viking Microwave, Model # VMOS200. Set the timer for 20 seconds. The light comes on, timer runs down, the turn plate does not turn and the water does not get hot. I removed the cover, checked for power to the PC Board and fuse which are good. All grounds are good. No power coming out of PC Board. I sure the PC Board is bad. Can anyone confirm this?

  • dangerboy12 Mar 12, 2009

    The microwave seems to be working fine, but it doesn't heat the food at all. The lights work, the display and the keys work, the turntable works, and it's on power level 10. Just no heat.

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  • Microwave Ovens Master
  • 9,098 Answers

Generally, the most common causes of a failure to heat are:

- bad door switches or door switch mounts
- loose connection at the magnetron
- problem or loose conneciton on the control unit circuit board
- bad magnetron or other high voltage part

If you or a friend decide to look into it, we have critical safety information, info on door switch diagnosis and replacement, and
disassembly information at our site, linked here on Fixya: http://tinyurl.com/yzjozk

Posted on Nov 18, 2007

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Posted on Jan 02, 2017

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If one or more of those three items do not work when you hit "Start", the I would suspect a bad door switch or mount.

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