My a/c started doing something funny today. It only blows through the defrost vents not the regular a/c vents. The air coming out is cold so I think maybe the problem isn't so bad. Any help or suggestions would be great!!!

 

One of the vacuum lines is off somewhere under the dash

 

Alright I'll check that out! Thanks!

 

Also check along the firewall for broken vacuum lines.

 

Did you fix it? Which vaccum hose was it? I have the same problem on my 86, I just haven't had a chance to dig into it yet.