Hi there. I have a 2008 Ford Escape and the heater will only blow hot air out of the front dash vents. We cannot get air to blow out of the floor or defrost vents. The control panel lights indicate that the proper vent has been selected, but the air flow does not change.
Suspect a control panel issue as this HVAC (heater, ventilation, Air conditioning ) system should be all electric... If you can pull the control panel out looking at the back of it will answer your question... are the cables or just wires..
SOURCE: No dashboard heat output
The climate control was poorly designed on these cars.
There is only heat on the floor and defrost settings, due to the layout of the ductwork.
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: 2002 ford explorer blower selection controls broken
Faulty door actuator motor or vacuum leak at heater harness under dash. commonly disturbed when installing stereos
SOURCE: ac vents not working
There is a blend door acuator which moves when u change your settings. Its a electric motor. Down under dash, Will need a mech and a heating and cooling diagram to find where the motor is,
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