Question about 2004 Ford Mustang GT

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2004 mustang gt. air does not blow from dash vents or defrost

Air does not blow from vents or defrost, only through the floor vents. cold and hot still work, and still blows cold or hot

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Behind the glove box is some colored vacuum lines. One connects to a vacuum motor that opens and closes the vent you mentioned. Check there first. You can usually pull both sides of the g/b inward to open fully. Also listen for hissing sound behind glovebox while running. If a vac line is disconnected it will make that sound

Posted on Dec 25, 2013

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  • Ford Master
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Open hood , passenger side firewall area, look for a thin,black vacuum line, follow it and look for any breaks or bad connection to its vacuum source. repair as necessary.

Posted on Dec 25, 2013

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Posted on Jan 02, 2017

chuck943
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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.

Posted on Mar 02, 2009

  • 37 Answers

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.

Posted on Mar 13, 2009

  • 4369 Answers

SOURCE: My 95 Ford Mustang will only blow air out the

check for a vacuum leak from the vacuum source on the engine to the heater control head.


defrost is fail safe mode.

A/C Vacuum Reservoir Tank and Bracket Removal and Installation

  1. Open the glove compartment (06010) .
  1. Working through the glove compartment , remove the vacuum reservoir retaining screw.
  1. Remove two vacuum hose tubes from the check valve and remove the A/C vacuum reservoir tank and bracket (19A566) .
  1. To install, reverse Removal procedure.

    A/C Vacuum Reservoir Tank and Bracket


    95adfe8.gif

Posted on Jun 06, 2009

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As per your problem mentioned. There are few solved help links to troubleshoot these problems. Go through the list and Click the link below:----

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http://whatisbyme.blogspot.in/2012/05/2000-toyota-avalon-no-heat-on-passenger.html


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1 Answer

No heat from vents


As per your problem mentioned. There are few solved help links to troubleshoot these problems. Go through the list and Click the link below:----

2000 Toyota Avalon: No heat on Passenger Side?

http://whatisbyme.blogspot.in/2012/05/2000-toyota-avalon-no-heat-on-passenger.html

------------

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http://technoanswers.blogspot.in/2012/02/no-heat-on-oldsmobile-silhouette.html

------------

Heater blows cold?

http://schematicsdiagram.blogspot.in/2012/02/heater-blows-cold.html

-----------

Heat blows cold on drivers side and hot on passenger side?

http://schematicsdiagram.blogspot.com/2011/12/heat-blows-cold-on-drivers-side-and-hot.html

----------

Hot air on the driver's side vents only?

http://repairhelpcenter.blogspot.com/2012/01/hot-air-on-drivers-side-vents-only.html

--------------

Temperature gauge does not move and no heat when heater is ON?

http://technoanswers.blogspot.com/2012/01/temperature-gauge-does-not-move-and-no.html

-----------

1992 Toyota Camry: A/C Control light Flashing and A/C not Blowing Cold?

http://technoanswers.blogspot.in/2012/04/1992-toyota-camry-ac-control-light.html

--------------


No heat, blower blows only cold?

http://technoanswers.blogspot.in/2012/02/no-heatblower-blows-only-cold.html
----------

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http://technoanswers.blogspot.com/2012/01/forf-f150-ac-only-blows-through-defrost.html

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http://technoanswers.blogspot.com/2012/01/dodge-ac-come-out-of-defrost-vents-only.html

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http://technoanswers.blogspot.com/2012/01/ac-vacuum-line-on-dodge-cummins.html

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http://technoanswers.blogspot.com/2012/01/ford-ranger-ac-blows-cold-through.html

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http://whoisbyme.blogspot.in/2012/06/2005-chrysler-p8t-cruiser-ac-blows-warm.html


-------------

2009 Mercury Grand Marquis: A/C blows Cold From Defrost Vent Only?

http://whoisbyme.blogspot.in/2012/06/2009-mercury-grand-marquis-ac-blows.html

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http://schematicsdiagram.blogspot.in/2012/04/ac-not-blowing-through-vents-on-2007.html

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Passenger side temperature is warm air out of dash vents?

http://schematicsdiagram.blogspot.in/2012/04/passenger-side-temperature-is-warm-air.html

----------


These will help.

Thanks.

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