defrost and floor heat and air conditioning work but won't come out dash vents
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2004 Ford Escape Question: dash vents won't work
Answer #1Brian Glastetter June 06, 2011, 18:50Master
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.