Thread: Climate control problem?

This is probably one or both "blend door actuators" gone bad. They are located behind the dash near the center, on the heater core box. Passenger side is cheap, driver's is more expensive if dual zone climate control. Available at most auto parts stores. To access the actuators, driver's side- you will need to remove the fuzzy "hush panel" under the dash to see it. Reaching it is fairly difficult depending how big one's hands are and what tools are available. The passenger side can be accessed the same way, by removing the hush panel on that side. Or by lowering the glove compartment past it's stops by squeezing the sides of the box while open. If you wish to confirm that this is the trouble, visually access each actuator and move the vent controls from defrost to floor while watching for action at the actuator (the end of the vent door's stud is visible). The common scenario is cracked plastic gears inside the actuator cases, and unit replacement is the normal solution.

the blend door actuators only control the hot or cold air. follow this how to to get in the dash, the round parts are vac pumps that control the air flow direction. theres one on both sides. car running, change the air flow direction, and watch these 2 vac pumps to see if they move.

http://www.grandprixforums.net/threa...+door+actuator

Bad info is my specialty! Thanks again Scotty.