Chances are you are looking for a vacuum leak in this case. The vent door actuators are run by vacuum. I recommend checking under the dash for damaged or disconnected vacuum hoses. When looking, start the engine and if you're lucky, you may hear a hissing coming from a leak.
Let me know what you find or if you have other questions, and thanks for using 2carpros. Com.
Sunday, February 14th, 2010 AT 1:12 PM