i have taken off the whole a/c system and replaced the heater box in the engine bay with one from a non a/c car. My heater controls seem odd. When i put the slider on vent, the air still comes out at the top of the dash where the defrost air comes out. The only way i can get the heat to come out the vents is to put the slider on the a/c side on max or normal setting. Is that a problem or is it normal because i removed the old a/c system?

 

sounds like a vacum problem I removed my A/C and did the same thing but my controls still work to blow air out the correct vents.

 

ya im starting to believe that the vacuum lines are messed, my carb is acting crazy as well.