| '89 735IL A/C questions
Good evening all,
Looking for help as I am my neighbors mechanic on his '89 735 IL!! We are having issues where the a/c seems to be working fine, but the heater is also on at the same time. This car has dual climate control. In the off setting, eveything is off, during the winter in the heat setting everything appeared to work fine. Now that we have charged the a/c and attempting to make it cool (it is 98 here in Texas), the a/c is running, cooling, but we then are getting hot air overriding the a/c system. When engine is cold--first start up--a/c works fine, but as engine heats up, the heater evidently is also. We think it is only the passenger side, but now not sure. Does this sound like a servo problem, a circuit board issue, or what? I am scratching my head as I have lots of experience with cars, but not BMW. Any suggestions? Thanks, Steve | 
