Climate Control Problems Please Help

[Cisc0]

Greetings X5'er,

My 2002 X5 with 86k miles has decided to give me problems with A/C. I took it to a shop because only the driver side window vent was blowing cold air and the rest warm. Upon inspection the guy tells me is my Auxiliary fan, and $400 dollars later the problem still persist. Took it to a different shop and the mechanic was more honest. He tested and measured the temperatures coming from the vents and said I have a "Climate Control Problem". The control unit seems to be working properly. At one point he put the temperature on the passenger side to 90 degrees and no heat was coming out from that side, but when he did it to the driver side it was heating up. He honestly told me his shop didn't have the proper tools to work on the car and told me I need to bring to dealership. He said it had to do with the "Air Blower Resistor" under the glove box. I took his answer and respected his honesty on not having the proper tools to work on the vehicle being that there are lots of aftermarket shops that would just stick it to you.

My concern at this is point is cost. Has anyone experienced these problems with the vehicle and if so what was the outcome/fix?

Any information would be greatly appreciated.