Bill, You're right. The actuator didn't fail and it is operated by vacuum. What broke is the thin metal arm which extends from the actuator and pushes against the rotating plastic pivot piece. I keep hoping that someone will share how to both best access the plastic tab so I can repair it and install the new actuator. It was a bear to get the new actuator attached the first time and I'm not going to try it again without some advice. Thanks, Joe