Yeah, the black hose coming out of it goes straight to the servo. I traced it there. I also tried manually closing the valve by pushing it forward, but didn't feel a difference in vent temps. Maybe I should try and hold it down longer, I don't know.

I will still take it in on Monday to see what they can tell me is wrong. I might just do the work myself, I know I'm capable of it, I'm just not capable of diagnosing!

Man I wish there were more people around me to help out!