Hey, I just found this thread because I am researching the same problem in my 2001 Cherokee. I haven't had heat for over a year, but I live in Florida so it's not an issue. A couple weeks ago my A/C stopped blowing cold. The compressor engages, there is condensation on the lines, the low side pressure is fine. The only thing I noticed is that I cannot hear the blend door move when I turn the temp dial. I don't remember now if I used to be able to, but I read somewhere that you should be able to hear it. Any ideas?
I've found a lot of info on GC's with dual climate control which I don't have, but not much info on my jeep. Thanks guys!