Auto Air Conditioning & Heater Repair: 1992 buick a/c, vacuum problem, buick century

Question
Hi
 Many thanks for your interest in helping others in need.
My 91 Buick Century blows air at the bottom air vents aof
after the air has shut off, some times I can feel it real
strong so I know the doors dont close.Is the control on the dash  at fault can I get a free diagram of the vacuum works?

                Thanks George

Answer
Hi George

It is a vacuum problem.  More than likely you have the main hose broken or disconnected.  From the engine compartment on the drivers side you will find at the fire wall a black canister.  You should have two hoses coming out of that canister check them for leaks.  Let me know