Air only comes out bottom vents and defrost vents - nothing comes out face vents
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Posted on Jan 02, 2017
SOURCE: air flow prob
the linkage that runs the blend door isn't working, these are the doors that control hot and cold and air flow to dash floor ect...they are located in the air box behind the dash ................ you may be able to pull the heater controls out of the dash and spot the problem but it's likely that the problem is in the air box itself and removal of the entire dash is required (big job!!!!!!!!!).........if your vehicle uses vacuum to control this (some gms use vaccum and some a cable)you might have a hose disconnected under the hood by the heater fan.........if it's a cable it may be knocked off at the dash controls or at the other end on the heater box..........sometimes removal of the glove box will give you acess to this connection.
hope this helps..........thanks fro choosing FIX YA!
Posted on Jan 04, 2009
SOURCE: the air for the air condition comes out the floor
It sounds like you have a break or pin holes in your vacuum lines, and it not allowing you to switch vents.
Posted on May 10, 2009
SOURCE: heater/ac door actuator isnt workin right. air
Sounds like either the computer that controls the auto climate control has gone out or you could have a vacuum leak. I would definitely check the vacuum leak first. I took my 98 Lesabre to a repair shop several years ago for the same problem. When I picked it up they told me my computer was out and it would cost around $600 to fix. As an alternative, they had unhooked and rerouoted vacuum lines, breaking a tube off the controls under the right side of the dash. They told me that they would have to remove my glove box each spring and fall and reconnect the vacuum lines to change the airflow from floor to dash and vise versa. My fix was to run the lines under the dash just beneath the ash tray and connect shut off valves to the vacuum lines. Now when I need to use the AC I can change the flow of the vacuum by simply turning these two valves so that the flow changes from floor to dash or back. I know this is pretty jack leg but the damage had been done and this has actually worked pretty good.
Posted on Aug 23, 2009
SOURCE: 92 buick park avenue stuck on defrost
Vacuum source under hood is disconnected or broken. look for a THREE WAY CONNECTOR WITH A ONE WAY VALVE.
Posted on May 16, 2010
SOURCE: A/C won't blow out the dash any more. Was
you have a bad vacuum line some were, it may have come off the motor or cracked...
Posted on May 24, 2011
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