98 Mustang AC problems

There's a vaccum line that controls the vent selector.Thee line could be broken someplace or it could simply have disconnected itself.Open the hood and look in the very far right hand corner.To the right of the brake booster (large black round thing with brake resevoir on top) there is a vaccum splitter.It has multiple hoses connected to it.Theres a real skinny hose that comes from the splitter and runs along the firewall and goes in on the pass side.Check to make sure it is still plugged into the splitter.Then follow it,and about halfway across the firewall it has another fitting that the line tends to break off of.

The other end of that line connects another fitting inside the firewall then to your vent selector control.

Check the first two connections and fix if broken then post back and let me know if it sixed your problem.

YW. glad ya got it fixed