Air Flow Control
Air flow control is accomplished in the following manner:
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: 1999 f350 ac blows from defrost vents instead of ac vents
check for a vacuum line that has fallen off the diaphram vacuum "switch can" near the vent shift lever at the heater box under the dash passenger side
SOURCE: why does the ac on my 2003 ford f150 blow through the defroster
Most likely it is a vacuum problem. That's what controls the air flow flaps.
SOURCE: My 2003 Ford Expedition a/c blows out the defrost
The vacuum motor is not operating right due to a loose vacuum tube, ore electrical connection or the logic is bad in the climate control electronics. The vacuum motor controls the door angle which controls whether the a/c blows out of the front vents or the defrost vents.
SOURCE: 2001 ford taurus wagon/air only flows through defrost vents
you have a vacuum leak check vacuum lines
1,006 views
Usually answered in minutes!
×