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08 Taurus X - no heat in floor vents

Discussion in 'Heating and Air Conditioning' started by Rob Jankowski, Jan 5, 2017.

  1. Rob Jankowski

    Rob Jankowski New Member

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    08 Taurus X, heat will come out of the dash vents or defrost but will not come out of floor vents. Ideas?
  2. Action

    Action Moderator Staff Member Respected Member

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    Welcome to the FFO!

    Most HVAC systems direct air flow based on doors. The doors move and redirects air flow based on input from the operator selection at the instrument cluster. More often than not the door is vacuum operated. If the system has a vacuum leak that is sufficient the door defaults to defrost.

    If you are getting flow that changes from vents to defrost based on YOUR selection on the controls, you do NOT have a vacuum leak. If the system does not change no matter what you do it is very likely you have a vacuum leak.

    If you have a vacuum leak it is a matter of following vacuum lines and finding a connection disconnected, line split or crimped.

    >>>>>>>>>Action
  3. Dominick 1

    Dominick 1 Well-Known Member Respected Member

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    Welcome to the Forum
    This post may help
    http://www.fordforumsonline.com/threads/a-c-comes-out-of-defrost.13476/
  4. Skyhawk

    Skyhawk Active Member Respected Member

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    Added thoughts: You may have a vacuum motor that has a leaking diaphragm, or bad connection to its vacuum hose, or a leaking hose (crack, pinhole, etc.). It is also possible the vent door is jambed and will not open/close so that air is not directed where you want it.
    Dominick 1 likes this.

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