Question about Sharp R-1480 Microwave Oven

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Built in Microwave won't turn off!

I was just taking out my lunch from the microwave, and when I went to close the thing it wouldn't stop humming! Although the turntable stops turning, I kept pressing random buttons but it kept on humming for 5 minutes(and is still humming)! I can't unplug it because it is a built-in mircrowave and oven. Help!

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  • Sharp Master
  • 8,404 Answers

Your machine is probably burned up by now ... but I will try to help you.

I suspect your door safety interlock switches are selded in the closed position. Remove the cover and look on the right hand side for these small switches. Unplug the device and be mindful there is 25,000 or more volts waiting to get you in the silver thing to the back side. Check the switches with a ohm meter. There is a common terminal, a normally open terminal and a normally closed terminal. My guess is one or both switches are going to read closed (short)

Posted on Sep 07, 2009

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Posted on Jan 02, 2017

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We repair these on a regular basis for customers nationwide with our guaranteed $39.95 service.

We have full details of our service, plus *critical* safety, disassembly, and troubleshooting info at our site.

You'll find a link to our site in our listing here on FixYa: http://tinyurl.com/yzjozk

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http://www.microwavedisplay.com/safety.txt
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http://www.microwavedisplay.com/doorsw.txt

We're happy to help and we appreciate your thoughtful rating of our answer.

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