Question about KitchenAid KSM90 Ultra Power Series Stand Mixer

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Mixer won't start

Hi there! This one is a stumper, and will probably need some of the best FixYa minds. I have a 10 year old KSM90 which has worked great for years. A few months back it began not turning on when the speed selector was set to stir. It would stir when set to level 2, run at level 2 when set at level 4, and so on (never reach high speed.)
I opened the back to take a peek, realized I was over my head and reattached the back. Since that moment, the KSM90 won't start at all.
I brought in my dad, a mechanical engineer with his volt/ohm meter. He verified that 110 was getting to the control board and that the control board contacts were closing when the speed selector was changed.
But that's as far as we could go without a wiring diagram. So! A two part question:
1) does anyone have experience with this specific problem and can give any insight?
2) If no insight, does anyone have a wiring diagram they can share?
Thanks in advance, I'm looking forward to see what you folks come up with!


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I have a PDF file entitled "kitchenaid service manual" that I could send you that I got online and can't remember where. If so my email address is Send me an email and I'll reply with the PDF enclosed. Otherwise try a google search of the above and you might be able to find it.

It's looks old but covers all the essentials including a wiring diagram

Posted on May 07, 2009



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If this Solution assisted you, please rate it. ricardok45

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