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My Sharp R-340D microwave works perfectly but Does NOT HEAT FOOD

Dear All , I have a Sharp Microwave model R-340D . it has worked fine for about 2 years . but suddenly , It stoped to heat at all . All other functions operates pretty well , ie , the lamp is on and the motor rotates during heating . and the timer operates we during the setted heated period . However , NO HEATING occurs . There is NO buzzling sound . What do you recommend me to do . Thanks, Best Regards, Eng.Waleed Said Mohamed . When I hit the Start Button last night, the microwave made a HUGE "POP" and now it wont heat food. Everything else works correctly (clock, display, light, fan, turntable...) but it makes a LOUD noise when it's turned on and it does'nt heat food. HELP It's about 3 years old.

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  • mcgill1 Nov 11, 2008

    My sharpe microwave oven dose not heat up any more.

  • Anonymous Mar 23, 2009

    i have the same problem it does not heat up but everythign else is working

  • William Miller
    William Miller May 11, 2010

    I would say the high voltage rectifier diode has blown.

    See http://www.gallawa.com/microtech/diode.h...

    I can help you with finding spare parts if you'll let me know which country you're in.



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Hi,
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Posted on Sep 30, 2010

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SOURCE: My Sharp R-340D microwave works perfectly but Does NOT HEAT FOOD

Waleed, Since the microwave is going through all its motions we can feel safe that the oven and magnetron thermostats are ok. If they were bad you would not have a display. Just inside the control panel to the left, you have 3 switches which the door activates. A primary (top switch) a secondary (bottom switch) and a monitor switch (middle). If the primary or secondary switch is not closing when the door is shut, you high voltage side will not activate, therefore no heat. If the monitor switch failed or found either the primary or secondary switch closed with the door open, it would blow the main fuse and the oven would be dead. Therefore Im leaning on either the primary or secondary switch not operating correctly. When checking these switches, unplug and discharge the capacitor. This is high voltage. Good luck

Posted on Jun 17, 2006

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