• ** REMEMBER! **The microwave can still shock you even unplugged!!

    ALWAYS discharge the high-voltage capacitor first if you even think your hands will come close to any HIGH VOLTAGE components.

    Jeff mentions this: Anything in the high voltage ( magnetron, capacitor, diode, wires to and from ):
    ...Use a metal ( not the shiny chrome type ) screw driver with a insulated handle to short across ( touch both at the same time ) the terminals of the high voltage capacitor to discharge it.

    From Jeff's site: http://www.applianceaid.com/component-testing.php

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FIXED KitchenAid KEMC307KBT04 Oven/Microwave combo 'Door' error


Premium Member
Apr 28, 2023
South Central PA
Model Number
More than 10 years
So a couple of years ago the magnetron in my Microwave/Oven combo started going bad, so we stopped using the microwave until I had the time to have a look at it. Fast forward to this past week and I finally made the time to try and fix it. Just before I pulled the unit, I fired up the microwave just to check and it sounded horrible (just like I remembered). After pulling the magnetron, I checked it and sure enough the magnetron tested bad. I was able to find a 'new' old stock magnetron and capacitor and replaced them today. I took a number of pictures, so I know I have everything wired up correctly. I hooked the unit back up and slid it back into the cabinet and turned the breaker back on. I tried the microwave and got the dreaded 'DOOR' error on the display. With a lot of four letter words, I disconnected everything and pulled the microwave back out. I have checked all three door switches and they test good. I have also verified that the 20A bus fuse and the 15A fuse by the magnetron/capacitor are good. If the door to the microwave is open, I am getting voltage to the light (even though the bulb is burned out). I am really at a loss as to what the problem could be.

Anyone have any suggestion on what else I can check? As far as I can tell, there are no sensors for the door, just the three switches.
I have checked all three door switches and they test good.

Just because they function during testing doesn't necessarily mean they're being activated properly. Did you test them while the door was closed as they would be when the error occurs? Maybe there's a misalignment of the latching mechanism?

Dan O.
I got it figured out...ID 10 T error (idiot for those that don't get it!). I accidentally got two of the connectors into the control board swapped. Thankfully the installers left the wiring diagram inside the top of the unit and I was able to trace the circuits and figure out where I went wrong. Microwave and oven are working perfectly now!
Great! Thanks for the followup.

Thankfully the installers left the wiring diagram inside the top of the unit

Most installers wouldn't touch it. Some service technicians will ... and without putting it back. I'd suggest you put it back when done with it for next time. JMO


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