I have both working AC/heat but for some reason it will not blow out of the dash vents. It comes out strong by my feet and when i put it on defrost it still comes out by my feet but i can feel a little blowing out of the defrost vent.

What is going on??

 

a/c check valve.....$5.44 at GM

been there....fixed that 2 times

pics available here : http://csce.uark.edu/~jgbertr/rb/4th_gen_tech1.html

 

Im not seeing the A/C check valve on that website... I found the A.I.R. Check Valve but im pretty sure thats not what you were talking about right?

 

sorry about that