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I've replaced the keypad and computer on my kems378gss3 Kitchenaid microwave oven/oven combo. Everything works EXCEPT that the microwave doesn't actually cook, and the timer set-start button doesn't work. I need the keypad codes to input so the computer will turn on the magnetron. Kitchenaid refuses to give me these. If someone knows these codes for this model and can give me these instructions, I'm happy to pay your fee. I am man of my word! Thanks. I asked this question once - a minute ago - but it disappeared from my screen and I'm not sure it got through. Hoping to hear from you.

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  • laurelton Mar 07, 2008

    Original problem: Microwave Display window showed DOOR (and you couldn't enter a time) - even though the door WAS closed. Checked all interlock switches. They checked O.K. While looking I found a hairling crack in the flexible printed circuit board that connects the keypad to the computer. I replaced BOTH as a fail-safe. With new kepad and computer installed, all works perfect EXCEPT for the timer set-start button, and the fact that even though the microwave oven works, it doesn't COOK. When pressing (and holding) 1, the codes are c30 r12 E - - Does this all help YOU to help ME?

  • laurelton Mar 07, 2008

    Thanks for the info. I'll take the thing apart later and RECHECK the interlock switches. I'll get back to you later. Stay with me. Thank you!

  • laurelton Mar 09, 2008

    Dear Jaime867 and everyone. FIRST OF ALL.... thank you for your generosity in trying to help. Curiously the problem I was having was caused by by 2 IDENTICAL 4 pin plugs - with identical keyways - that I interchanged when re-assembled the unit. Since they LOOK idenrical it was an easy mistake. It is curious that Kitchenaid would do this. As I was checking and rechecking (with an ohmmeter) I discovered a number of "illogical" conditions which could ONLY be caused by wiring mistakes. Since I did **t alter any of the connections, this made ** sense. I **ticed that the color coding of the wires going to these identical plugs was arraged differently. (The color coding was in the diagram inside the microwave.) Putting the plug back correctly solved the problem. (Replacement of the keppad and computer was still necessary, though I'm lucky the mixing these plugs didn't blow anything up! Thanks again.

  • Jaime Hernandez May 11, 2010

    What was the original problem that made you changed the keypad and computer?



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I would suggest to check all the connections from the new installed parts and double check your switches.
Have you followed the user guide from page 35 to try to unlock that key?
If still does not work, there may be two possibilties that the new keypad(timer set-start button) may not work or the magnetron is defective.
Check this link as well for some additional info.

Posted on Mar 07, 2008


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I've replaced the computer on my kitchenaid kems378gss3 oven/microwave combo. I need the "codes" to key in on the keypad - to make the microwave actually "cook: things. Everything else works...

If you don't have the owner's manual you can download it here:

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