a/c climate control is abnormal
Hi, I suspected my ac system in my 1997 540i doesn't work properly. When I turn on a/c, it doesn't matter what temp I set, ranging from 60F to 90F, there is no different in the air temperature coming out from the vent - it is always cold. the only way I can lessen the air temperature is by turning the round wheel on the air vent from say, 3 blue dots to 1 red dot, then I can feel the cold air lessen. Does this sound normal to you guys? Normally, shouldn't changing the temperature's degree would alter the air temperature?
Any comments would be helpful. Thanks