Kenmore microwave model numbr 72180039700 does not heat anything

I don't know of anyway to repair the keypad. Usually replacement (of the keypad/control console) is the only option. But you might want to remove the ribbon cable that connects the keypad to the control board behind it, clean it with a degreaser (like Fantastic or 409), dry it, and re-insert it, and then try again. (Remember to unplug the microwave oven first before you try that!)

If you need further help, reach me via phone at https://www.6ya.com/expert/ronald_e6b9572cebe3ad27

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

Microwave Oven Basic Troubleshooting Tips

heatman101

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

Hi,

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

Basic Microwave Oven Troubleshooting Tips

heatman101

'.;.;.;.;.;.;.;.;.;.;.;.;.;.;.;

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

Microwave Oven Basic Troubleshooting Tips

heatman101

78g

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

Dave

Sounds like a bearing is tightening up when it get heated up with use. Then after a cool down period it works normally until using it heats it up again. Eric

your problem might be more than a fuse chech the magnetron

no, just 1 main fuse for everything. there are temp safety devices though, and door closed safety switches. Most likely failure though is the magnatron.

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

For Kenmore models, you can usually find an exploded view by entering your model number here: http://www3.sears.com

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