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Microwave casing gets very hot when used

When I use my mwave, the casing is getting hot each time. Today, I used it for about 7 mins and the case was very hot. It took a good while to cool down, even though unplugged. Are you able to help please?

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  • William Miller
    William Miller May 11, 2010

    This can be caused when
    the internal cooling fan is not running properly or by a magnetron that is

    When I say internal
    cooling fan, I do not mean the hood vent exhaust fan which you can turn
    on and off manually.

    I'm instead talking
    about the internal fan which comes on automatically whenever you

    It is vital that the
    cooling fan runs, or the magnetron will be destroyed.

    Is that fan running properly?

    Any unusual noises? Is
    it louder or quieter than usual?

    Please reply back with your brand and model number so we can help you.



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SOURCE: khmc107b (not a bt): lost power, won't start again

The most likely causes are an open thermostat on your magnetron or the internal fuse. You can find helpful exploded view diagrams and order parts by entering your base model number (without the suffix) here: The fuse is shown on diagram 5 and the thermostat on the magnetron is on diagram 8. If you or a friend decide to work on it, we have *critical* safety and disassembly info at our site, which is linked at our listing here on FixYa:

Posted on Feb 25, 2007

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SOURCE: Sharp Carousel Model R-9H56

Did you happen to spray any cleaner directly onto the keypad? Hope not. Just wanted to exclude that poissibility to save time.

Assuming this model does not have a feature allowing you to turn off the turntable via the control panel, the motor msay be failing. Or you may have a bad door switch.

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:

Posted on Nov 22, 2007

  • 17 Answers

SOURCE: microwave gets very hot on

If it gets hot enough were it is uncoftable to lay your hand on it then there is most likely a problem. If it is a new unit I beleive I would return it. Good luck.

Posted on May 17, 2008

  • 9086 Answers

SOURCE: microwave dish/tray rotates intermittently.

If the turntable is not turning, you will get hot spots and uneven heating.

You can see and hear a video of how a turntable motor should sound when you rotate it by hand.

If yours is not set to be off via the control panel, and it won't rotate or it sounds like it's grinding, etc., you may have a bad motor or plastic coupler.

To replace either, you need to unplug power, then remove the bottom cover of the oven.

You can get Samsung parts here.

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

Posted on Aug 03, 2008

  • 3600 Answers

SOURCE: my microwave only heat after a long time on the highest hot setti

The microwave emmiter bulb has most likely died.

Posted on Aug 03, 2009

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