Perhaps is a vacuum leak or could be a broken vacuum line or perhaps is a
faulty vacuum diaphragm that controls air flow! Could also be a stuck
air-flow door! Does the engine sound different than when the issue began,
any hissing or something flapping sounds?
What engine size it that?

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Bing Bang Boom Viola Done!
> Hi there i have just found my first problem with my taurus
> the aircon and air vent is feeding the air on defrost outlets ,feet
> outlets, but not on the face outlets.
> any one ever had this happen.?