Question about KitchenAid KBMC140HSS Convection/Microwave Oven
First we should determine if it's actually cooking when you just close the door, or if it's only the light and fan running.
You can test it by putting in a cup of water and closing the door for 30-60 seconds, then checking to see if the water is warmer.
If it is actually cooking, then it's your control panel that needs to be repaired.
We regularly repair these control units for customers nationwide by mail for $39.95 postpaid in about a week with a one-year guarantee.
If it is not cooking, then you have a problem with the lower door switch (primary interlock switch) or its mount.
That's a pretty easy DIY fix. At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.
Then you can see this file: http://www.microwavedisplay.com/doorsw.txt
There should also be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting, testing, and locating components.
You can usually find helpful exploded view diagrams and order parts by entering your full model number here.
Feel free to contact me directly (and please remind me of your full model number) for more information & help.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
William E. Miller
Posted on Nov 24, 2008
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