Question about Sharp R-510HW Microwave Oven

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Sharp Carousel Convection Microwave R-9H56 suddenly stops heating

I have a Sharp Carousel Convection Microwave R-9H56. The microwave works fine. The problem is the convection. You set it to pre-heat and it goes through the motions like it is preheating ie. carousel rotating, light on, making noise like it is working, but it takes forever. Eventually it suddenly stops (makes no sound like it has turned itself off). The display is static, displaying the temperature I was trying to heat it to and if you feel inside the oven it is stone cold (hasn't heated at all although it says it is preheating for so long). Another problem is it doesn't do it all the time. 50% of the time it works fine then next thing it won't. Taken it to be repaired twice. Had the thermostat replaced but still doing the same thing. Repairers cannot find problem. Help please. I really don't want to replace it as I love this oven.

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  • 5 more comments 
  • yenrah Feb 08, 2008

    I have the same problem as described...I set it to preheat, it seems to be working , then shuts off without getting warm. I would like to know if the other poster found a solution to the problem.

  • Anonymous Feb 10, 2008

    i have the same problem but the turntable is not turning

  • mrbeezer Jun 20, 2008

    similar problem except that if I place the oven on it's back it works fine. Checked all sitches and all are ok.

  • Anonymous Jun 28, 2008

    My micro is doing the exact thing except it does heat the micro/oven up but then stops will no warning and the temperature is never reached that you were trying to reach. Sounds like it is a defect on sharps side!

  • maggie311 May 22, 2009

    I have the exact same problem - the microwave does not heat - I had this microwave repaired about 4 times and there is still a problem. It is a fantastic one, large and looks good in comparison to today's inferior looking microwaves. I am in the Western Cape South Africa

  • Anonymous Mar 27, 2014

    will not preheat for convection baking and will not re-heat on microwave setting

  • Anonymous Mar 29, 2014

    will not mircrowave or preheat for convection

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  • 225 Answers

At highvoltage section wiring may bae problem, check wiring and connectrors of magnetron and capacitor and transformer.

Posted on Dec 12, 2007

  • amd64online Apr 25, 2011

    The micro switch for the door stops working. Poke it with a wooden (non conductive) skewer about 20 times should temp fix it.

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