I bought my 94 850 almost two months ago and was told i'd need to do some work. I finally gave in the other day when my cabin fan stopped working. I took my car to a guy I know who works on volvos and he replaced the ECC unit for me. I picked it up today and all was well until this evening when I drove home from work and the fan pooched out on me again. I don't know what to do. It's the long weekend and I can't call volvo to troubleshoot and I haven't gotten an answer from the guy who did it. I'm just a kid and can't really afford to go to volvo about it. Any ideas what it might be?

 

Try to pull the codes and see what they are and post them here.
To learn how click link and follow instructions.
http://www.troublecodes.net/Volvo/

A/C is port is B2 also look here for some more info.
https://volvoforums.com/forum/volvo-850-16/list-diagnostic-trouble-codes-dtc-9856/

 

in the link you sent it says non turbo models, what if I have a turbo? how do i get a scanner?

 

That works on all the 850's up to 1995. In 1996 you need a hand held scanner.
Ignore that fact that is says turbo. It works on all of them.