problems with a/c blower
I took my 2007 3 S Touring to the dealer last summer (2008) after the air conditioner quit working. They replaced the unit but didn't charge me for labor since I was about 1000 miles over my warranty. I had also complained that before the a/c unit froze up, the blower wasn't working on occasion. Sometimes it worked and sometimes it didn't. The dealer said it was probably related to the a/c unit going bad so they never did anything about it.
About a month ago my blower stopped working again. Because I have never found any dealer to be competent in the service department (sorry, lots of bad experiences), I took it to a friend of mine that is a mechanic and actually knows how to fix cars. He said that one of the magnets or something in the motor was bad and that the blower will work for a while, but if I shut the car off and the bad magnet stops in the wrong position, it won't work the next time I start the car. Normal driving over bumps and whatever can shake the motor around until a good magnet gets into position and the blower will suddenly start working again. This explains why sometimes it works, and sometimes it doesn't. This also explains why the blower makes a ticking noise when it's running.
Bad news is that the blower requires a dashboard pull. It's around $325 to replace. The parts for mine have been ordered for over a week. Just waiting...
Good luck!