11-20-2012, 12:20 PM
I think the control is open. You can confirm by disconnecting one end and measuring resistance. (Forget about the middle lug for now.) If it is open, there is virtually no hope, and you will have to replace it. But if it is still good, then further investigation is needed. Sometimes a ground or B- wire gets disconnected or whatever which can have exactly the same effect. Let us know what you find.