My a/c quit blowing through the vents. It just stopped. I'm trying to prepare for the warmer weather install new window motors(which I had two window motors go out) and recharge the system but now the air don't flow the vent. It works only through the defroster. Anyone ever had this problem and know how to fix it. 84 Delta 88

 

A lot of times that happens because the hose came off the vacuum reservoir on the engine side of the firewall.

 

X2. Accidentally knocked mine off....drove me crazy for a couple of days.