• ** 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 microwave combo KEMS379BSS01 door open issue


Premium Member
Jan 31, 2023
Model Number
6-10 years
I have this 8 year old microwave combo and initially found the error code to be an open door problem. I replaced the broken ceramic 20amp fuse and replaced the 3 door switches. When powering on I still get an open/close door message but no error code. When I try to enter in the diagnostic mode cancel/ cancel/ start nothing happens. If I try the same on the oven control panel it works there. Does this tell me the board W10915648 is possibly the issue?
I’d recheck the switches and connectors. Primary and secondary are normally open. Monitor is normally closed. Your primary interlock switch was likely bad and blew the fuse. I don’t see a 4th microwave door switch. There is an oven door switch but I’m not sure it would affect the microwave
Okay I will do that today. However, what explains being unable to initiate the diagnostic mode? Thank you.
After looking further it appears that the key sequence that’s working for you is for the door switch and latch switch. Check for continuity with door open and closed at P1-5 to P1-7. Door open = infinite resistance, door closed = zero resistance.

The manual just says if it will not go into diagnostics try again lol. Not real helpful.


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It's fixed. I checked the wires to the board and one was loose and must have loosened during the repair. Thank you for your help.
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