Sharp Microwave Does not Heat

William Miller

• 9179 Answers
• Posted on Sep 16, 2008

SOURCE: sharp digital microwave oven is not heating

I would most suspect a shorted high voltage rectifier diode, a bad connection on the FA terminal of the magnetron, or a bad magnetron.

Here are some links you or someone you know can use (in order given) for test help, but read the safety warnings first:

http://www.gallawa.com/microtech/diode.html
http://www.gallawa.com/microtech/mag_test.html
http://www.gallawa.com/microtech/xformer.html

You can usually 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.

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

William Miller

• 9179 Answers
• Posted on Oct 13, 2008

SOURCE: Sanyo Microwave EM-G4775 - doesn't heat up......

It's probably a loose connection at the magnetron or a bad magnetron.

If it's less than one year old, it should be fully covered under warranty. I'd suggest contacting the manufacturer to get it fixed free.

If it's within the magnetron portion of the warranty (usually 5-9 years) but out of the original full warranty (usually 1 year), then your manufacturer will cover the part cost, but not the cost to visit you or the labor charge to do the work.

Some manufacturers (in the US anyway) will send you the magnetron to do it yourself. If nothing else, you can save about $75US by taking it to the shop yourself.

Apparently you're in the UK, judging by the model number.

You can find Sanyo UK microwave owner's manuals here.

You can find Sanyo UK support, parts and authorized servicers here.

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

SOURCE: microwave has works but doesn't heat

Sounds like the Magnetron has stopped working. The Magnetron is is a specially designed powerful magnet that generates the high frequency microwave energy used to heat food.

William Miller

• 9179 Answers
• Posted on May 06, 2010

SOURCE: MCM1290A Microwave Oven: the timer counts down but it wont heat or the turn...

Probably a bad door switch. See this file.

SOURCE: Have a 22" microwave oven

There are a few things that will cause this problem, the high voltage diode, or the high voltage capacitor, and the magnetron are usually the culprits. I find that one or more of these parts will go making the cost to repair at least $100.00 and up.