A/C Blows Warm Air - Replace fan or FSR?
 

I've tried doing several searchs on this topic, but I haven't been able to find a conclusive answer. I have 2003 X5 3.0i. My a/c is blowing warm air on every setting. I checked the auxiliary fan and it does not run when the a/c is on. According to the forums I've read, this is the source of the warm air. What's the solution? Replace the aux fan or replace the final stage resistor? Thanks

Fan or fan relay defect.

It could be your evaporator. I had the same issue with only hot air coming out. The evaporator is a long repair. It requires the entire dash to come out. Hope you are under warranty or CPO if this is your issue. Hope this helps you out....Phil