How do I set the timer and use the cook function at the same time on my Kenmore microwave model 405

William Miller

• 9179 Answers
• Posted on Mar 23, 2007

SOURCE: Microwave buzzing

It's likely a bad magnetron or maybe the high-voltage transformer. If it's within the warranty period of the magnetron (5 years or less), I would call Sears. In my professional opinion, no one should work on a microwave unless they are fully informed and aware of the deadly hazards and necessary precautions. If you or a friend decide to work on it, we have *critical* safety, disassembly, and troubleshooting info at our site, which is linked at our listing here on FixYa: http://tinyurl.com/yzjozk You can find helpful exploded view diagrams and order parts by entering your full model number (without the suffix) here: http://tinyurl.com/gv383

SOURCE: Model 721.80803400 microwave blank control panel

there is a transformer on front pc board.might need tech to have a looksee

SOURCE: Kenmore Microwave Hood Combination: over the stove Model #721.80602500

Disclaimer: I'm a DIYer, not a technician.

Our GE over-the-range microwave stopped producing heat yesterday while warming part of the T-giving feast. Everything else (fan, control panel, light) works fine.

After disassembly and testing last night, I discovered a defective "secondary door switch." Your Kenmore uses a similar switch (~$19 on-line), and that might be the problem. But it also could be other things, such as a bad thermal cut-out.

If you know anyone who's handy with a multimeter, most of the basic diagnostics seem to be pretty straightforward.

William Miller

• 9179 Answers
• Posted on Mar 07, 2008

SOURCE: Kenmore Microwave Hood Combination

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

We have full details, 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

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

SOURCE: Microwave turns on but doesn't cook

There is an inline fuse that is accessed by removing the outer casing. Follow the power line in to the magnatron and you should see the fuse. Make sure the fuse that you replace it with is the same as the one you removed. If this doesnt work then the magnatron has gone out.

Dave