Question about Sharp Microwave Ovens

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Oven works but does not heat or defrost

Was working fine, then one day out of the blue was unable to heat or defrost. Clock works and all functions can be obtained but when Start button is pressed oven starts to rotate etc but does not heat or defrost as required.

Have had micorwave just on 4 years and have not had any other problems with it.

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  • Sharp Master
  • 8,820 Answers

Generally, the most common causes of a failure to heat are:

- bad door switches or door switch mounts
- loose connection at the magnetron
- problem or loose connection on the control unit circuit board
- bad magnetron or other high voltage part (such as a shorted diode)

If you or someone you know decide to look into it, we have critical safety information, info on door switch diagnosis and replacement, and disassembly information at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk

You can usually find helpful exploded view diagrams and order parts by entering your full model number here: http://tinyurl.com/gv383

But your best bet is to reply back with your brand and full model number so we can possibly help you better.

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

Posted on May 22, 2008

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