Question about Kenmore 63792 Microwave Oven

1 Answer

Kenmore Microwave 721.66339 burning electrical smell coming from back. Six month old oven

New oven, using properly but unable to use due to safely reasons. Fan in back isn't working, when in use smells like electronics burning.

Posted by Anonymous on

Ad

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    New Friend:

    An expert that has 1 follower.

    Corporal:

    An expert that hasĀ over 10 points.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 7 Answers

I have this same problem with a similar Kenmore elite, it tested good when I bought last week, heated a cup of water to boiling in 70 seconds or so. I used to help rive around my next door neighbor who was a microwave repairman, I learned what went wrong with them and typical fixes. Back then there was only 1 brand being sold the Amana Radar range which sold for well over $1000 for the cheapest models. They had no sensors like they do now. Only a few things could go wrong with them making them simple to make money off repairs. So I do know my way around a microwave, I sell 4 or more a month and repair maybe 1 or 2 a month. But this one has me stumped. I took a look inside and cleaned the grease off the cover right away as I always do. I also had to repair a few tabs that hold the panel and top cover piece. .after the cleaning I reassembled it and tested it again. It worked fine. Then 2 days later I found the missing platter for it and went ahead and cooked a frozen macaroni and cheese family sized dinner to give it an official test to see if I should just keep it and sell my current oven. After 5 minutes it seemed like it was cooking kind of slow. It was in my garage during this so I didn't notice any smells till I checked on it. It should have been completely thawed but not hot yet (if it was in my 17 year old GE) so I turned the dial to cook a frozen dinner and not just times cook. I watched it and that's when I smelled the burnt plastic smell, strong on the right side. But that's also where the light bulb is, that bulb only comes on when the oven is cooking?
I put may face closer to see inside and only saw the bulb, I took it apart and tested everything and the only issue I found was the humidity senor is reading low resistance by about ? of what it should be. This would not account for any burning smells since it's on the left and only tells the oven how the food is cooking. It would either keep cooking longer or say it's done before it really is depending on how the resistance is read by the cpu connected to that sensor.
the diode checked fine, the hf cap is fine, the transformer was good, the magnitron was not shorted and tested within the speced ohms range. Ok controls work and I can set it to run at different heat settings without any problems. I can hear it kick in a run for 50% when I set it to that setting, but it still isn't even getting a cup of water hot now. All wires are connected good, the entire board works properly, the readout and button select and work. I haven't tried the fan yet. I'm going to check it out but I did doin it by hand when the forget was off and it spins freely. I don't have an extra humidity sensor to test it but I'll get one very soon and report back here. I was hoping that this was a problem that was specific to my model and hoped to find the quick answer but this is a common problem in general which seems to have only one typical response provided by every single person but a select few. The answer given 95% of the time is buy a new oven! That's not the answer to fixing the oven. I'm pretty sure that anyone who comes here looking for a solution isn't hoping that 9 out of 10 answers will be buy a new one or they would not be here in the first place, they'd be out buying another oven that will likely break even quicker than the last one that they are dealing with fir the first time after 15 years. New microwaves are junk, I fix more ovens that are 5 years or less old. I sell ovens from the 1980s that still work perfectly! Every Samsung is junk and every sharp and magichef are still going strong 30 years later. It's because the magnetron is built using pure elements and not made by Deawoo or Toshiba, that's why Panasonic's last so long too, they aren't using substandard parts to make their expensive ovens. This really has become a race to the bottom when it comes to making new appliances these days. All are built with end of life factored in, at least until they figure out that they can no longer cheaply mine those elements needed and find a new way to make things using even poorer substitutes.

ill post my findings as soon as I get this figured out it can't be that hard, there's only a handful of components that can burn or give off any smell at all I suspect it's the light bulb and there's something else unrelated that's dying. My guess is the magnetron or the transformer is faulty even though they read within ohms specs. Magnetron made by Toshiba, I've replaced many toshiba on deawoo magnetrons.

Posted on Oct 05, 2019

Ad

6 Suggested Answers

Anonymous

SOURCE:

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Ad

Anonymous

  • 579 Answers

SOURCE: Burning smell , Microwave not turning off

the control circuit shorted out from the cleaning session and kept the microwave on so long with nothing to cook that it has cooked itself I'm sorry to tell you. Probably not worth repairing

Posted on Jan 01, 2008

jmgldsmth

Jim Goldsmith

  • 2005 Answers

SOURCE: Kenmore over the range microwave 721.63684300 - nothing works

you must remove the MW take off the cover then look for a large metal can (capacitor) and a white (ceramic) fuse...look and, smell and, you should find the cause

Posted on Apr 22, 2009

Anonymous

  • 2 Answers

SOURCE: The fan on our Kenmore microwave oven is not working.

My husband took the unit off the wall looked down into the fan and found a dead mouse keeping the fan from spinning. We removed the dead mouse cleaned up the area. Turned on the oven. The fan worked perfectly. Then he rehung the microwave.
Thanks!

Posted on Aug 21, 2009

Anonymous

  • 1 Answer

SOURCE: Generic problem for all Kenmore Microwave

Loud hum is usually due to faulty hv diod, resonance capacitor, or the magnatrone feed thru capacitor , chk it with a ohm meter , one by one n replace it .. zaheer Islamabad

Posted on Dec 31, 2009

heatman101

D. Floyd Kolb

  • 43501 Answers

SOURCE: microwave smokes and smells like burning plastic

Hi,
Here is a tip that will help you to figure out what is wrong with your Microwave Oven....

Microwave Oven Basic Troubleshooting Tips
http://www.fixya.com/support/r5508031-microwave_oven_basic_troubleshooting

heatman101

Posted on Aug 07, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

7 yr old unit emitting burning smell. Everything still works. Is it worth trying to get repaired or just buy a new one.


is the burning smell just when you use the convection oven or when you use the microwave , reason I ask is that if its only coming from the convection oven then chances are you have something melted on the heat elements , this can be cleaned off with a dry brillo pad

Nov 20, 2015 | GE JVM1790 Convection / Microwave Oven

1 Answer

Burning smell or smell stuck in the vent?


sweet smell from an electrical appliance is ozone cause fir high voltage discharge ( like the sweet smelling air after a lightning strike
take it in for a proper diagnosis

May 31, 2017 | Microwave Ovens

1 Answer

My Kenmore 721.626222 which I have had about 6 years, runs but does not heat. There is also a strange smell - something like a burning smell.


When the oven does not heat, the problem is usually due to the magnetron failing. It the part that generates the microwaves that heat the food. It fails by shorting out causing a loud buzzing noise. The burning smell is the being magnetron overloaded due to the short. It not worth fixing since the replacement cost of a magnetron is close to the price of a new oven. Sorry.

Feb 09, 2011 | Kenmore 62622 Microwave Oven

1 Answer

Jenn-Aire over-the-oven microwave is giving off a smell.


do not use, un safe. cheaper to buy a new one than repair.plz rate-bozcro

Sep 13, 2009 | Amana Radarange Microwave Oven

1 Answer

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!

Jan 11, 2018 | Panasonic NN-H964 1200 Watts Microwave...

1 Answer

Smell of burning in my daewoo microwave oven. It has never been used before


Daewoo make some cheap microwave ovens. I have one, and it is rubbish. It came fitted in a new caravan, and because it decided to keep cutting out after only a few minutes of use, it was replaced by another that had the same problem. I know it's a cheap oven, but it should work. I wouldn't recommend this to any caravanners, and would recommend a different make.

The smell should go when the Daewoo goes!!

May 03, 2009 | Microwave Ovens

3 Answers

Microwave smokes and smells like burning plastic


Hi,
Here is a tip that will help you to figure out what is wrong with your Microwave Oven....

Microwave Oven Basic Troubleshooting Tips
http://www.fixya.com/support/r5508031-microwave_oven_basic_troubleshooting

heatman101

Jan 25, 2009 | Kenmore 64663 Microwave Oven

1 Answer

Smoke Coming from inside of Microwave even when warming for 10 seconds


Proberly wave guide cover at side it can get grease behind it,And when you used it with small load it tried to cook it and then burned the mica cover,Take mica cover off and try it without it to seeif problem resolved if ok,New cover can be obtained if req.Regards grandadfixer

Oct 10, 2008 | Thermador MBBS Microwave Oven

2 Answers

Burning smell , Microwave not turning off


the control circuit shorted out from the cleaning session and kept the microwave on so long with nothing to cook that it has cooked itself I'm sorry to tell you. Probably not worth repairing

Dec 27, 2007 | Kenmore 62702 Microwave Oven

Not finding what you are looking for?
Kenmore 63792 Microwave Oven Logo

Related Topics:

208 people viewed this question

Ask a Question

Usually answered in minutes!

Top Kenmore Microwave Ovens Experts

William Miller
William Miller

Level 3 Expert

9179 Answers

Gerry Harvey
Gerry Harvey

Level 3 Expert

1481 Answers

Cindy Wells

Level 3 Expert

6073 Answers

Are you a Kenmore Microwave Oven Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...