Question about KitchenAid KCMS1555RSS Stainless Steel Microwave Oven

1 Answer

Microwave stopped heating, evenything else works

KitchenAid KCMS1555RSS stopped heating. Everthing else works, full display works, time counts down, turntable rotates, light comes on, etc. but no heat. First three times this happened, I fixed it by unplugging the unit, waiting a few seconds, and then trying again. Unit worked each time for another week or so. Happened again, and now power cycling it does not help.

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  • 2 more comments 
  • rphilli5 Jan 09, 2009

    Everything appears to be working normally, except it does not heat the food. Any ideas?

  • jhmarcus Jan 10, 2009

    Microwave was only about 7 months old. Turned out to be a bad magnetron which KitchenAid did warranty.



    Thanks for the ideas!

  • Anonymous Apr 01, 2009

    Same description, no heat but everything else works except makes loud hum. Magnatron? Cost to replace? Unit is just past warranty period, of course.

  • William Miller
    William Miller May 11, 2010

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



    We have a sound clip of what a microwave should sound like when the cooling fan and high voltage section are operating here.

    With the symptoms you
    have described, I would most strongly suspect a shorted high voltage rectifier
    diode or a bad magnetron, or a loose and possibly corroded connection on the magnetron's terminal.


    How old is it / how many years have you owned it?


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KitchenAid KCMS1555RSS stopped heating. Everthing else works, full display works, time counts down, turntable rotates, light comes on, etc. but no heat. makes loud hum. Magnatron? Cost to replace? Unit is...


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BEWARE OF LETHAL VOLTAGES!
The fault may be just the diode and a reasonable cost will be involved. If it is the magnetron, depending upon where you purchase one from will command the price.
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