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Motor shuts off at high speed

When i move the lever to #8 and #10 the motor shuts off. I normally don’t mix at high speed but it was by chance i moved the lever to those positions and discovered the problem. Any assistance would be great. Thank you.

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Quoted from the following link:

"If your mixer is only working on certain speeds, you might need to replace your circuit board. Don't worry, follow this guide on how to replace the circuit board."

KitchenAid Classic Mixer K45SSWH Circuit Board Replacement

Probably a good starting point if you are thinking of doing the repairs yourself. Just make sure you unplug the unit from the AC wall receptacle before undertaking any repairs.

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My theory is when you increase the speed above certain level your mixer will start vibrating, this vibration may trigger the safety feature and that causes the motor to stop, to prove that, you need to set the lever at #7 and shake the mixer, if it stops then my theory is correct.

Be careful please !

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