I live in SC and I had the same problem last spring. Unacceptable. The part is a vent shutter door servo motor. It is located on the right (passenger) side of the the lower center console. Remove the cover, and you will see black servo with wires attached. The lower one is for the upper vents (go figure).
My local thief Lexus dealer wanted $400 for the part. I ordered through the parts dept. At Stevenson Lexus of Lakewood, CO. Approx. $140. Plus shipping. I am no mechanic, but had the old out and new in in under 15 minutes. A/c has been blowing in my face since then.
Thursday, September 22nd, 2011 AT 2:37 PM