Question about 2002 Cadillac Deville

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Air or heat will not switch from lower to upper dash vents

Air or heat will not switch from lower to dash level,when mode switch is changed, can hear the deflector clicking somewhere behind dash. On rare occasions it will switch while driving, if the the mode is on upper,but will go back to floor vents when stopping engine. Where is this deflector and how does one get to it.

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My actuators are going out one by one, they started by getting stuck so I could look under the dash and my husband would change setting so i could see which one was clicking and i would manually move it to get it unstuck

Posted on Dec 14, 2017

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You might have a vacuum leak ,a broken or loose vacuum hose to one of the actuatores that open and close the vents

Posted on Dec 08, 2017


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Posted on Jan 02, 2017

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SOURCE: a/c blows from floor

sounds like two problems. the ticking sound is probably a broken blend door stop. the wet floor is probably a bad heater core, both require dash removal.

Posted on May 20, 2009

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SOURCE: Yesterday the AC air stopped coming from the upper

try to check if the vanes works well also try to check the A/C filter

Posted on Jun 15, 2009

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SOURCE: Air is blowing out of defroster and floor but not main dash vents

Check for vacuum hose leak.

Posted on Jun 17, 2009

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SOURCE: air cond warm coming out of driver side dash,warm passenger side

you want me to post a free solution yet want to charge for info I requested for free?

Posted on Jun 19, 2009

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SOURCE: A/C will not always come out dash vents, clicks,

Sounds like vacuum solenoid Divertor control or Vacuum leaks.

Posted on Jul 09, 2009

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I’m happy to assist further over the phone at

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