hi there,
my cavalier climate cotrol switch will go to all the positions but it no longer opens the window vent. a big problem in winter! any ideas whats wrong?
I tried checking behind the control switch but didn't notice anything amiss. It use to make a clunking sound as it switched. now no clunking sound and no switch either! help!
thanks

 

If I am not mistaken that is a vacuum controled assy. Look for a broken, cracked, or disconnected line. If there are one way valves make sure that they work properly.