The ac button provides a signal to the ECM for engime idle up with A/C on and turns on the compressor via the ac circuit.
All doors are driven by a small motor on the side of each pivot. It is a small black flat component with a connector. It can be removed with 2 or 3, 7mm screws. I suspect one is binding or the flap is binding, They are about $40.00 each. If it was me, I would change one from another area as they are all the same. This will isolate if it is the flap/door or the motor. Good luck
Thursday, May 25th, 2006 AT 5:58 PM