The door clicks open and shut constantly if I turn on my defroster which I need at this time of year. I must hold in the max air button to keep the door from opening and closing. But then it uses only recycled air from the interior of the car.
What happens if I unplug the max air motor on my Vibe? on 2004 Pontiac Vibe
seek diag and est as your car needs to be looked at to determine problem