Air vents wont switch from defrost to floor etc

SOURCE: Vent control

You have a vacuum leak.Defrost is the default postion(no vacuum).
See if you can locate the small black vacuum line that goes inside the vehicle on the passenger side near the heater core. The trace it back,should see it going to a canister then to the intake manifold.Make sure it is not disconnected or broken somewhere.

SOURCE: PROBLEM WHEN SELECTING THE DIRECTION FOR THE AIR

Sounds like you have a supply vacuum problem. When you lose supply vacuum to the control head it defaults to defrost.

SOURCE: Auto climate controll only blows through defrost & floor,not the

it either has a vacuum line on the back of the unit off or the control unit is bad

Bill

• 424 Answers
• Posted on Jun 08, 2009

SOURCE: Problem with air not coming out of vents.

Check for a vacum leak from the engine to the a/c.The color of the hose is black. Also check if the heater control valve hose is unplugged. If you have vacuum the it sounds like the door for the vent/floor/defrost is broken.

SOURCE: 2002 Ford Explorer When turned to defrost air

sounds like your door blend actuator which is under the dash and a pain to replace