Question about Kenmore 80809 Microwave Oven

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Kenmore microwave 721.80593402 died

The gadget is about 3 year old. Went off out of the blue after starting cooking. Burnt fuse replaced, all the lights came on, but when started cooking, the whole unit died again (tried twice) . What could that be? How can I get it fixed? My Kenmore Elite Microwave at first would not work at all after plugging it into the wall. I took it apart and put in a new fuse, then when I plugged it in the wall, it gave power and prompted me to enter the clock information, etc. Then, whenever I press the start button on the unit, the circuit breaker immediately pops, but the fuse is still okay. Do you know what might be wrong with the microwave or what needs to be replaced? Obviously, something is shorted...

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MicrowaveSvc
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SOURCE: kenmore microwave 721.80593402 died

If it went dead almost immediately after pressing the Start pad, that's usually a shorted high-voltage capacitor.

If it went dead a few seconds after pressing the Start pad, that's usually a failing high-voltage transformer.

If you or someone you know wants to look into this, we have critical safety, disassembly, and troubleshooting info at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk

You can probably find exploded views and order parts by entering your model number here: http://www.searspartsdirect.com

There should also be a "mini-manual" hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting & testing.

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

Posted on Jul 12, 2008

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Why does the fan keep running on a kenmore spacemaster 300?


Check those 3 micro switches in the door latch assembly. A bad microswitch can blow the main fuse. This usually ruins the microswitch.

Nov 13, 2017 | Kenmore Microwave Ovens

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If the microwave control panel doesn't light up, then your fuse is blown. unplug the microwave. unscrew the vent grill, (2) screws at the top of the microwave. then you should see 1 screw holding the control panel. after removing that screw, gently push up then out. there should be a metal plate on top of the control panel. remove that plate and the fuse will be in that opening. remove the fuse and check for continuity across the fuse. Replace fuse and microwave should begin working.

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Was using it last night to heat something up. When almost done, microwave made a zizt type of sound and went off. I turned it back on and it continued cooking, but I started smelling burned plastic or


More common then you think, i have gone through a couple microwaves in the last ten years, they both failed very similar to what you describe. One popped the breaker one day, reset the breaker and it worked again but had an odd smell to it. I took it apart and couldn't find anything burnt or melted so i tossed it and got a new one, i didn't want a microwave burning the house down! I would suggest unless your really tied to that microwave that you just replace it for safety sake. Four years or forty years old don't matter anymore, i had one microwave, LG brand, that died two months after the warranty expired and it would cost more to repair it then replace the thing!

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Replace the fuse with a ceramic fuse from Home depot! costs less than $3 and it will fix the problem. I had all the same problems as everyone else, you name it my microwave had it! you must remember replace it with a ceramic fuse! not a glass one. I know people say its the switchboard and all that nonsence but I promise you, the fuse plays a majoe roll in the microwave not working properly. Even though it doesnt look broken, a junky fuse can cause your appliance to do very strange things. I replaced mine 6 months ago and it works like its fresh out of the box.

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Just went dead. checked outlet for power has power to machine


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Apr 04, 2009 | Microwave Ovens

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Kenmore microware does not heat


It's one or more of the following items -

Fuse
Diode
Capacitor
Transformer
Magnetron

Yes, you can fix the unit, and I can give you direction, but make sure the microwave circuit is not covered under a longer term warranty.

Feb 01, 2009 | Kenmore Microwave Ovens

1 Answer

Kenmore microwave 721.80593402 died


If it went dead almost immediately after pressing the Start pad, that's usually a shorted high-voltage capacitor.

If it went dead a few seconds after pressing the Start pad, that's usually a failing high-voltage transformer.

If you or someone you know wants to look into this, we have critical safety, disassembly, and troubleshooting info at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk

You can probably find exploded views and order parts by entering your model number here: http://www.searspartsdirect.com

There should also be a "mini-manual" hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting & testing.

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

Jul 09, 2008 | Kenmore 80809 Microwave Oven

1 Answer

Lights up BUT does not cook


was there any motor that should run as you turn it on, the fan inside and the rotating table motor. try to replace that micro switch at the door that bubbled out and burnt. try to test or replaced right away the industrial diode that is connected from the capacitor to the ground of the microwave.

Feb 17, 2008 | Panasonic NN-S763BF Microwave Oven

2 Answers

My microwave died


A microwave can be dead for many reasons.

If it goes dead for a while during or after cooking then comes back on, the magnetron is probably overheating and causing the thermostat to open. When it cools, it closes the circuit and allows power through again.

If it's random, it may be a bad connection, usually on the control board or fuse holder.

If it went dead almost immediately after pressing the Start pad, that's usually a shorted high-voltage capacitor.

If it went dead a few seconds after pressing the Start pad, that's usually a failing high-voltage transformer.

If the fuse is good, it may be an open thermostat or thermal cutout on or near the magnetron or on top of the cavity / body of the oven.

At our site, we have critical safety information, info on door switch diagnosis and replacement, and disassembly information.

See our listing here on FixYa: http://tinyurl.com/yzjozk

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