Air conditioner problems?

Question

on my 01 f150 the air worked fine but then it stopped blowing threw the panel vents and only blows threw the defroster vent no matter what panel i set it on???

Answer 1

clean the filter

Answer 2

look under the hood where the vacc. line goes into the veh, the lines sometimes crack there causing that problem

Answer 3

sounds like a vaccum problem or a switch make shure the vaccum line to the swich did not break

Answer 4

Vaccum leak for sure.. If it is doing it constantly it is a pretty big one..Check under the hood for any crack/disconnected small rubber tubing.