i have a 1994 audi 90cs...i have air, but its neither hot or cold. what do i fix?
check the level of charge in your refrigerant system. If you do not have the ability to check it take it somewhere and have the refrigerant removed and noted how much was in the system. If it is completely empty you will probably have to diagnose a leak. If it has some refrigerant in it but is low and has not been charged recently then recharge the system, have a flourescent dye added to diagnose the small leak when the system is low again.