Question about Kenmore 63662 / 63664 / 63669 Microwave Oven

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I have a Kenmore Microwave Model #721.80522500 that simply does not heat anything. Everything seems to work except that it doesn't heat anything at all.

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  • Master
  • 534 Answers

Magneto or magnatron has gone bad. This is the part that sends the waves through the food to heat it.

Dave

Posted on Jan 12, 2010

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6ya6ya
  • 2 Answers

SOURCE:

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Posted on Jan 02, 2017

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SOURCE: microwave no heat

The "HUMM" indicates a breakdown in the High Voltage Side. The loud "POP" was the breakdown. You have only four Components in the High Voltage side.

1. High Voltage Transformer. You can eliminate this as the problem. Why? If it was the problem it would have blown the line fuse, and would have given off a burned transformer smell.
2. High Voltage Diode. Usually will Burn or Pop when shorted, but will then OPEN the Circuit and there is no "HUMM".
3. High Voltage Capacitor.This is the Silver Can with the two terminals on top. It can SHORT internaly between the plates (the two terminals) and give the "HUMM".
4. Magnetron. This is my number one suspect. A SHORTED Magnetron.

Posted on Feb 03, 2008

MicrowaveSvc
  • 9174 Answers

SOURCE: Everything works... except the heat!

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. Its continuity must be checked.

Switch or mount trouble can be caused by slamming the door or by opening the door while it's cooking without hitting the Stop pad first.

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

You can probably find an exploded view by entering your FULL model number here: http://www.searspartsdirect.com

A full Sears/Kenmore model number usually has 3 digits, a dot, then 8 more digits, such as ###.########

If you think the problem is on the control panel, which we repair these nationwide for $39.95 postpaid.

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

Posted on Mar 16, 2008

SOURCE: wjusino just asked: My kenmore microwave doesnt heat.

In all likelihood the mangnetron has failed, or perhaps even the Power Supply. or a fault that is shutting the system down for safety reasons You need to have it serviced by a reputable service centre/man.
Ensure you get a firm "Quote" before proceeding, and remember these days the cost of repair can equal or exceed the price of a new one.

Posted on Jan 26, 2010

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Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

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Everything works except it doesn't heat anything


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