I have an 06 F-150 the air is working but it doesnt blow out the dash vents I can feel it a bit at my feet and a tiny bit out of dash vents the fan is working fine is this a vacum issue?

 

The vent controls are controled by electric servo motors, not vacuum like older models. You could have a stuck link in the system or a failed servo motor. Somtimes if you can find what is not working, it could just be solved by lubricating the mechanism.

 

Always use a dry lube.