AC/Vent Help

[rrb16]

Hey, I'm new to this so here it goes. I own a 95 grand am 2 door coupe quad 4. i don't know much about cars, but i can learn. my ac/heat only works in the vents by my feet and nothing comes out of the top vents. when i turn it on i can hear it blowing but nothing is coming through them. if you could help, i would greatly appreciate it. if any other information is needed just ask

[xeroinfinity]

Do you hear any hissing in the dash ?

Sounds like the something broke... could be the vacum actualtor for the defrost.
You'll need to inspect that area see here.

Or the head unit could be bad, could be the blend door stuck/broken.

Good Hunting !

[rrb16]

I'm not sure what you mean by hissing, but i can hear the sound of it blowing while nothing comes out. i'll check that area that u showed me too

[J-Ri]

The mode doors (defrost, vent, floor, mixes) are vacuum operated. If there is a vacuum leak, you may hear a hiss where it's leaking, if it's inside the car.

Something is probably either stuck or the head unit is bad. With no vacuum to anything, the actuators default to defrost. Check for vacuum to the actuators. If anything other than the desired position is being commanded, it's a bad head unit. Also disconnect the actuators and move the doors by hand to make sure they aren't binding.