If the system is electronic climate controlled, whatever side is blowing cold, that electronic actuator is bad and must be replaced. I just had to fix my pass side, it was blowing cold. The acts are not cheap and I got a used one for $40. Somertimes you can get lucky and only the gear is missing teeth, and I suppose you could move the gear 180 deg so the motor has teeth to grab. In my case the act was dead completely.
The driver's side elec act is harder to get too if that one failed.
The system uses two electronic acuators and three vacuum actuators. The vacuum acts control the recirc, mode, defrsot doors. The elec acts control temps.
See this post on how to replace either.
http://www.grandprixforums.net/f73/b...ent-21941.html
