I have a 92 325. The a/c control unit does not work (back window defogger, a/c, recirc or airflow selector) after the car has been sitting for awhile (eg. overnight) especially when it is cold. The 38 degree warning chime also doesn't work as well. After driving awhile, it will start operating normally. I had the a/c control unit replaced, and it still does the same thing. The dealer (only one in the state) is stumped as well as some private mechanics. I would appreciate any thoughts on this. Thanks.
