Question about Sharp R-1405 / R-140 Microwave Oven

3 Answers

My sharp r-1450 microwave stays on(fan & light )but will not cook

I was using the micro and took out one item and replaced it with another.I closed the door and pressed start.The light and fan stay on,the turntable does not move,there is no cooking.The cook buttons and the start buttons do not work and no audible sound either.The power level,timer,clear.and stop buttons work.The turntable button beeps and the display changes but the turntable does not work.The micro will run constantly (fan and light only).You have to unplug the micro at the outlet in order to shut it off. Thanks for your help. MIKE

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  • mbamuscarell Nov 17, 2008

    Is the key pad different from the control board?

  • mbamuscarell Nov 17, 2008

    Yes,I just had one clarification regarding whether the key pad was the same as the digital board? thanks I was very impressed with the speed in which you replied. thanks again

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3 Answers

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  • Master
  • 734 Answers

This is usually caused by either a bad door switch, a loose door switch mount, or occasionally a problem on the control panel.
On these, it's usually a broken tab on the upper switch holder.

One test that sometimes helps is to gently lift up (and/or push down) on the door or handle as you try to start it. If it works or tries to work, then it's a door switch mount or door alignment issue.

That sounds like what's happening when you hold the Start pad - maybe you're moving the frame and chassis enough to help it work.

Even though a door switch clicks, it may still be bad inside. Its continuity must be checked.

Door switch or mount trouble can be caused by slamming the door or by opening the door while it's cooking without hitting the Stop pad first.

There are plastic mounts inside the microwave which hold the door switches and onto which the door latches lock when you close the door.

The screws on these mounts may be loose. If they get too loose, the switches will not be activated properly.

Sometimes it's a broken tab on the switch holder, allowing the switch to rotate just out of position. This tab can be hard to see, since it is under the bottom edge of the switch.

If you or someone you know decide to look into it, we have critical information on safety, disassembly and door switches at our site, and our link is at our listing here on FixYa:.

You can probably find exploded views and order parts by entering your model number here at the Sears parts site.

The best place to order Sharp parts is Tritronics.

If you think the problem is on the control panel, we repair these nationwide by mail for $39.95 postpaid in most cases.

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

http://www.microwavedisplay.com

For parts, you can also call Tritronics toll-free at 866-779-5835.

Posted on Nov 17, 2008

  • futureloginn
    futureloginn Nov 17, 2008

    for more follow the link
    http://www.fixya.com/support/t945648-sha...

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  • Master
  • 1,011 Answers

Dear Sir/Madam,

This is the problem with Motor. U need to replace the motor. Then it will be worked.

Thanks
good luck

Posted on Nov 17, 2008

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  • Sharp Master
  • 19,396 Answers

This is a faulty digital control board, have the digital control assembly replaced.

Posted on Nov 17, 2008

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