defrost and floor heat and air conditioning work but won't come out dash vents
dash vents won't work on 2004 Ford Escape
The air distrubution system on your vehicle is vacuum controlled. Start by inspecting the vacuum hose and check valve in the engine compartment. Install a vacuum pump and see if the system can hold vacuum. If that is good, then the problem most likely lies inside the dash. A series of tests must be performed at the vacuum switch. It could also be a failed actuator. The technical degree of difficulty increases at this point, so if you are not comfortable with under dash repairs, a qualified technician should be involved.