I have a KitchenAid pro mixer that is making a slow clicking noise. It gets faster as I turn up the speed. I first noticed it after replacing a stripped worm follower gear. It sounds like it's coming from the motor. I have checked/cleaned/and re-greased all the other gears several times, and I am confident they are all working properly. Everything looks fine. As far as I can tell. It is not a huge clicking noise, but almost sounds like the fan is hitting something as it goes around. Is this something I should worry about? If I should worry about it, how do I fix it?
Does it only do it under higher load? Mine clicks a little bit when kneading dough, and I determined that it was actually the bowl moving a bit. I have a lift-bowl model, but it could be either that or the hinge on a tilt model.
If it is under load, try pushing on the bowl to eliminate movement. If it happens even when empty, this isn't it.
Happened to me after replacement of lower gear housing. It's caused from having the two motor mount screws too tight. I realized that could cause a bit of stress on the harmonics of the motor operation. Loosened and reinstalled just barely over a light snug, that did the trick.