Own Whirlpool microwave model MH7100XY, everything works on it, however it does not heat anything, heard a small pop and after that it does not warm or cook anything?????

From the descriptions it likely the magnetron has failed. If you have a digital multimeter post me a comment and I will give instructions to do a rough test.

if microwave is counting down but no heat you either have a loose connection at the magnatron tube or the thermal cut out fuse that is connected to the magnatron has blown or you have a micro switch, that has failed

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

Basic Microwave Oven TroubleshootingTips

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
gdhj

HI, the magnetron has failed at this point. the pop you herd was from the magnetron tube. i would also check the high limit capacitor as well. it may have caused this pop as well.

I would replace the capacitor(high limit) and magnetron in this case.

The failed magnetron has been automatically confirmed by the no heating issue but, the cap may be on its way out soon.

you may have gotten a power surge and that can cause some funny things to happen, 1st is there power to the oven, 2nd if so there may be an internal fuse protector built in to the oven, check with the manual for anything of that sort listed. if not you may have to take it in and have it repaired by a pro. there is a lot of voltage in these ovens and unless you know what you are doing a person could get hurt

Please go through this link for possible troubleshooting steps:
http://www.repairclinic.com/0088_6_1.asp#Level1_5

Hope that helps!

This is usually caused by a blown high voltage rectifier diode.

Here are some links you or someone you know can use for test help, but read their safety warnings first:

line-height:normal">mso-fareast-font-family:"Times New Roman""> http://www.microtechfactoryservice.com/diode.html

line-height:normal">mso-fareast-font-family:"Times New Roman""> http://www.microtechfactoryservice.com/mag_test.html

line-height:normal">mso-fareast-font-family:"Times New Roman""> http://www.microtechfactoryservice.com/xformer.html

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You can usually find helpful exploded view diagrams and order parts by entering your full model number here: http://tinyurl.com/gv383

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.

Hello,

The Microwave's "Magnetron" is what heats things up. This is true for all Microwave's. The magnetron is normally on the left and sends excited electrons across the interior. Those electrons bounce around inside until their energy is spent.These excited electron 'waves' are slightly larger than the hole openings in the front door glass panel black grid. Usually, when a magnetron goes you would see and hear some popping and witness some arcing inside the interior. However, you may not have been nearby when this happened. Since you heard popping behind the control panel, you probably have electronic failure in the control panel and that failure may have been precipitated by the magnetron or not. In any case, it is very dangerous to disassemble a Microwave and access the magnetron unless you are trained and have been qualified to do this.

With the cost of Microwaves having stabilized and also being quite low compared to 20 years ago, I would take it to a warranty service provider in your area that also sells them, such as Home Depot for example. That way, if it is too costly to repair compared to a replacement cost you can shop for a new one and may even get a discount should you ask them to give you one.

Sorry for the apparent bad news but if you feel this is the answer you're looking for please rate this solution as fixed or helpful. It means a lot to those of us who work for you in the free area instead of for a fee.


You can phone or write this address below for questions regarding your warranty or warranty repairs. Othewise, you can shop online for a replacement at homedepot.com or sears.com

check the magnitron and capacitors one of this is bad