Question about 2001 Cadillac DeVille

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What causes the ac to only blow out the defrost and floor no matter what postion it is set for on a 2001 cadilac devill

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6ya6ya
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Posted on Jan 02, 2017

  • 279 Answers

SOURCE: AC blows through defrost and floor vents instead of ac vents

You have a vacuum leak in the system that controls the vent doors. First check for cracks at the vacuum reservoir, then check the various vacuum hoses and vacuum motors for a leak.
Charlie

Posted on Jun 19, 2009

dttech
  • 4803 Answers

SOURCE: change starter in 2001 cad devile

The starter on that engine is mounted between the cylinder heads under the intake manifold. You will need a set of injector O-rings and an intake manifold gasket set to do the job. It is not really hard to do, but a bunch of stuff has to come loose to get the manifold off.
HINT: The gasket surfaces for the intake manifold are very easy to clean up in preparation of re-installing the manifold if you use some rags and carburetor cleaner.

Posted on Nov 28, 2011

skychief2001
  • 21873 Answers

SOURCE: my ac blows out defroster and floor vents

Could be a blend door problem, or the ac controller.

Posted on Aug 24, 2012

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You have a vacuum leak in the system that controls the vent doors. First check for cracks at the vacuum reservoir, then check the various vacuum hoses and vacuum motors for a leak.
Charlie

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Does it still blow out the floor and defrost when you set the switch to those positions or does it alway blow out the defrost no matter what? If you can get air to blow out to the floor, then it sounds like you lost the switch that controls the airflow to the vents. If it only blows out the defrost, then you probably lost the vacuum to all of the switches. When the vacuum is lost, it will only blow out the defrost. Check the smallest line on the vacuum distribution block located in the corner near the brake master cyclinder. That line provides the vacuum to control the direction of airflow within the cabin.

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BLOWS HOT AIR ALL THE TIME,AC WORKING,TURN TEMP CONTROL ANY POSTION SAME TEMP


I've had 2 Astros. A 1993 and a 1994, and had a problem with the heat/AC on both of them. They blew only air through the defroster no matter where I set the control, heater, A/C, floor or vent.

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