While you wait for answers, we may have found some information which could help you.
Click here for Repair Control MixerHow to disassamble kitchenaid KSM90 mixer?
My kitchenaid professional series stand mixer won't turn on?
kitchen aid 550 professional burned up motor?
Blender lights flashing and smoking?
Kitchen Aid - speed lever?
Replace a Cord on a Kitchenaid 4c mixer?