'84 528e

[barmstrong]

I have an a/c problem. the a/c is blowin warm. I am trying to eliminate any problems before i spend the 100 on getting it charged, as it was said to be working before i bought it. I have blocked coolant flow into the heater core, verified both fans are working, and am pretty sure the compressor is functioning fine. Does anyone know if there are any other common bugs that might cause it to blow warm. I did notice that there are a couple of temp sensors on the a/c, heater system; will they effect if they the system blows cold?
thanks in advance!

brian

[E28boi]

The first step to diagnsing your a/c is to make sure there is freon in it. There is a window on the receiver/dryer where you can see the freon in the system. If the freon is low it will cause it to be warm.

[97alpineM3]

Unless you have a break in an a/c line... or every a/c line for that matter... the only thing I know that would make it blow hot would either be no freon... or your temperature valve is stuck to the HOT possition...