OT- Gas Clothes dryer problem

[RayP(MI)]

Old Whirlpool gas dryer: Controls are a dryness/cycle selection knob, and a start button. All of a sudden the other day, it started starting without the use of the pushbutton. All you have to do is turn the dryness/cycle switch from off to somewhere in the cycle, and it starts running. No need for start button. Been a while since I had this problem, and have forgotten how to correct. Any ideas?

 

[Bob]

Likely, the appropriate switch in the "stack" of centrifugally-operated switches at the back of the motor has stuck "closed", bypassing the "start" button.

 

[RayP(MI)]

Thanks, Bob. Pulled the wiring diagram, and the switch is momentary contact, and then it looks like a centrifugal switch in the motor takes over. All this does is run the motor, other circuits controlled by timer. Guess I should take motor off and clean it up - almost a new motor...