Kenmore Microwave Won't Heat Food

SOURCE: GE Microwave doen't heat any food or liquids

PROBLEM MAY BE A RELAY ON THE CONTROL BOARD OR MAY BE A LOOSE WIRE FROM THE HV TRANSFORMER CKT.

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 Nov 26, 2007

SOURCE: Microwave stopped heating!

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This may have already been dealt with, but others can benefit from an accurate, thoughtful reply to this problem.

Concerning the problem Guest is having with the fan coming on when the door is open.

This is usually caused by either a bad door switch, a loose door switch mount, or a problem on the control panel.

Even though a door switch clicks, it may still be bad inside.

If you or a friend decide to look into it, we have critical information on safety, disassembly and door switches at our site, linked here on Fixya: http://tinyurl.com/yzjozk

Concerning the original problem of no heating:

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 conneciton on the control unit circuit board
- bad magnetron or other high voltage part

If you or a friend decide to look into it, we have critical safety information, info on door switch diagnosis and replacement, and
disassembly information at our site, linked here on Fixya: http://tinyurl.com/yzjozk

William Miller

• 9179 Answers
• Posted on Nov 30, 2007

SOURCE: Microwave not working

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

If you or a friend 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

SOURCE: kenmore galaxy model 721 microwave hood combination

You put a mounting plate on the wall behind where the unit will be mounted. Then the microwave hooks onto the bottom of the mounting plate and you swing it up to the cabinet above it. Then you must screw 2 mounting screws through the floor of the cabinet above into the bracket on top of the microwave.