I have a 95 ford mustang convertible that the ac started blowing only out of the defrost. I found a vacuum leak in the engine and repaired the line and it started blowing out the proper vents except now it only blows hot air. I had the ac evacuated and recharged at only 1.2 lbs but it is still only blowing hot air. I repaired one vacuum leak in the engine compartment am I to understand there may be another one. It is blowing out of the vents like it should now an I had it charged but still only hot air.
I think this link will help
https://www.stangnet.com/mustang-forums/threads/a-c-problem-on-95-gt.641508/
Testimonial: "This was very helpful I had already located a vacuum leak but still needed to recharge system and reset it at the junction by jumping it. Thank you."
I have had dozens of vehicles over the last 40 years. I could not afford to pay somebody to do the work. This computer stuff is a blessing. I try to put stuff out there which might help someone. Thank you for your comment. When I read a question I think what if it were me. Sometimes I put stuff out there which is more than needed but I am thinking what would I have needed.
Thank you
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SOURCE: ac will not blow thru ac vents, only thru defrost vents.
if vent doors are operated by vacuum check for loose or broken vacuum hoses in the engine compartment , or check the fuse box for any ac/heat fuses if it is a electricaly controoled system
SOURCE: AC/BLOWS FROM DEFROST VENT ONLY
passenger side right above the airbox 1 plastic line it loves to pop off
SOURCE: 1998 Mustang - AC blows only through Defrost vents
You probably have a vacuum leak on the passenger side. its a small plastic hose some times they come unpluged from the engine. or brake.
SOURCE: Heat wont blow through heater or defroster vents
common problem, check under dash by the gas pedal if control arms are muving went selecting from ac to heat cuz this it is the control for the vents to go from ac to heat and to defrost.
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
A/C Vacuum Reservoir Tank and Bracket 
NO HEAT ON FLOOR VENTS
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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:----
http://whatisbyme.blogspot.in/2012/05/2000-toyota-avalon-no-heat-on-passenger.html
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http://schematicsdiagram.blogspot.in/2012/02/heater-blows-cold.html
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http://repairhelpcenter.blogspot.com/2012/01/hot-air-on-drivers-side-vents-only.html
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http://technoanswers.blogspot.in/2012/04/1992-toyota-camry-ac-control-light.html
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http://technoanswers.blogspot.in/2012/02/no-heatblower-blows-only-cold.html
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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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http://schematicsdiagram.blogspot.in/2012/04/passenger-side-temperature-is-warm-air.html
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These
will help.
Thanks.
As
per your problem mentioned. There are few solved help links to
troubleshoot these problems. Go through the list and Click the link below:----
------------
------------
http://schematicsdiagram.blogspot.in/2012/02/heater-blows-cold.html
-----------
http://repairhelpcenter.blogspot.com/2012/01/hot-air-on-drivers-side-vents-only.html
--------------
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http://technoanswers.blogspot.in/2012/04/1992-toyota-camry-ac-control-light.html
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These will help.
Thanks.
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