Question about Whirlpool GH7145XF Microwave Oven

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Microwave does not heat

All electronics, display pannel, clock, light, work but the turn table and heating both quit working at the same time.

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  • Anonymous Mar 23, 2014

    Light, clock, turn style,and fan still working

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  • Whirlpool Master
  • 5,568 Answers

The high voltage circuit that supplies power to the magnetron may be separately fused inside. Unplug it, remove the back panel and look for a fuse clip. The high current fuses (20-30 amps) often have a white ceramic housing and are tubular. If you have a multimeter at home (you should, they are cheap) you can check the fuse after removing it from the holder.
The reason your other things are still working is that they have separate supplies; the one for the panel will supply only low voltages and not much current.
If you have a meter, check for a largish black plastic component often mounted on the floor of the case. This will be a diode or diode bridge and this can also fail.  A meter would let you check it if you have one.    

Posted on Nov 28, 2008

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