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Posted on Jan 02, 2017
Some thing you could look at would be this. The control is usually fed by a vacuum line or small hose thats is connected to your intake manifold.
With a cold engine,look for a skinny vacuum hose that runs from the intake toward the fire wall . It should be going inside the cab and connecting to the A/C vent control.Some times the hose becomes disconnected or splits or cracks due to heat under the hood.
Thats usually the trouble.
I hope this helps you.
Posted on Oct 06, 2009
the ac blend door is out of adjustment or the the actuator is not working look behind the glove box and watch the arm move
Posted on Jul 24, 2009
the idea of the switch is run on vacuum and is not making contact with the switch it self either worn contacts in the switch itself **** as an obstruction as well or the vent door is stuck in just that position either behind the glove box or the ash tray are the vacuum lines one of them may be pinched off or the door needs a bit of help until you can free it up
Posted on Sep 08, 2009
Sounds like the switch that closes and opens the door for the changing of air flow is bad.
Posted on Feb 17, 2010
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