A/C works but doesn't blow out front dash vents

Sounds like one or more of the Blend Door Actuators are broken, so that when you tell the climate control where to send air, it can't actually do it. If you have Auto Climate Control, you have two of these (I think it's 4 if you have manual A/C and Heating). They're about $30 each, if you can replace them yourself.

However... It would be unusual for both actuators to break at the same time. Before spending money, check fuses 12 and 8 under the dashboard; they may have blown.

Sounds like the main problem is a vacuum leak. When you loose vacuum the ac/heater will default to the defrost position. Check for vacuum leaks first.

A late reply, but was the issue solved?

Have you checked the AC filter? It tends to get choked over time, especially given that it pulls all the air from the front/engine compartment. You will see a lot of cooling but no air. Or it could be the 2 vents are blocked due to some debris clogging the passage to these 2 vents.

It is usually located behind the glove compartment/under the dash. Take it out and give it a good dusting. Should clear out nicely.

Look for the unplug vacuum cord by the passenger side...then look for the thing that looks like a plunger by your front window... and plug them to things back up....it should blow then...if not you'll need more 134a or your AC compressor is not spinning....

Mine ended up being that the vacuum line broke off inside the rubber plunger. Poked it out with an awl and re-attached at everything is working now. Looks like it might have been manipulated or banged around during a battery install. Thanks!