The problem usually lies in the tee fitting that goes to the reservor they use a short piece of rubber hose that cracks and leaks this is the kicker very difficult to get to its between the firewall and the floorboard on passenger side. What will work to fix it on the cheap is take it loose before it goes into the firewall on passenger side engine compartment its a red hard plastic vacuum line that goes into a rubber connector turns black then runs into firewall disconnect there are anywhere on that line and find a place for your new vacuum line to go through the firewall on drivers side about a 3ft piece will work then under dash you'll find cluster whare a bunch of vacuum lines plug in just unplug the black one its the other end of the one you pulled off.and plug new line in. Fixed dont really need the reservor anyway.
Why are you answering a question posted 9 years ago ?
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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: I have a 2003 Ford Windstar and the venting system
I have the same problem with the blend door, if i manualy reach up by the gas pedel i can switch it to go out the panel, i pulled the controls out and i dont think im getting vacuum on the lines.
i bought a haynes book DOESNT HELP AT AT ALL ABOUT THIS PROBLEM
SOURCE: ford radio stuck in dash
Keep trying, try to push it back in and pull that side first.sometimes they can get crooked coming out.
SOURCE: the 2003 ford windstar tries to start without key
check to see if one of the wires is touching the ignition wire on the solenoid
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