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HVAC prob - directional damper?

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Old Jul 16, 2005 | 03:16 PM
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Default HVAC prob - directional damper?

I start my car today for the first time in about a month or so, and I notice the AC isn't really cooling the car down. Then I notice the air is coming out just a little out of the bottom, middle, and top vents all at once, but it is cold. When I toggle b/w every setting, the air never moves, so I assume the damper that tells it to blow out of the vents or defrost, etc, is broke. Has anyone had this problem before, and is it something I can fix myself to avoid taking it to the dealer?

Thanks!
99 C5 with electronic dual zone HVAC option
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Old Jul 16, 2005 | 05:49 PM
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Originally Posted by SevenT6Vet
I start my car today for the first time in about a month or so, and I notice the AC isn't really cooling the car down. Then I notice the air is coming out just a little out of the bottom, middle, and top vents all at once, but it is cold. When I toggle b/w every setting, the air never moves, so I assume the damper that tells it to blow out of the vents or defrost, etc, is broke. Has anyone had this problem before, and is it something I can fix myself to avoid taking it to the dealer?

Thanks!
99 C5 with electronic dual zone HVAC option
Have you ever had a battery leak in this car? If acid gets on the small black vacuum hoses underneath the battery and is not removed soon enough, it may have damaged them. Several members have complained in the past that the damaged vacuum line(s) caused the damper door to be inop and created the same type of condition you have.
Remove the access panel on the rear of the right-front wheel well housing and check them. They can be replaced by splicing with new vacuum line if necessary.
Have you had the intake manifold off for any reason? Swap for a Z06 unit or to repair something? If so, the small black nylon vacuum line that attaches at the rear of the manifold may be off/disconnected, and therefore you will not have a vacuum source to operate the damper system. HTH
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Old Jul 16, 2005 | 06:07 PM
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I have the same issue. Try this thread. Zuti
A/C fix
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Old Jul 16, 2005 | 08:15 PM
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The car is bone stock from it's original air filter all the way to the exhaust tips...except for the battery. So stock manifold is on there and has never been moved.

And funny you should mention battery leak...

As a proactive person, I removed the factory battery in anticipation of it leaking, and bought one from walmart. The new f'ing battery started leaking, and I didn't catch it right away. I took it out, and clean it out real well with water, and all the wiring looked fine (nothing was eat up). Apparently I need to look at the vacuum lines though. I REALLY hope this is it, b/c it sounds like a simple fix.

This happened a few months ago, and I know the HVAC was working properly after that. Maybe the vacuum lines deteriorated more after then...???

FYI, I have one of those yellow top gel batteries now.

Last edited by SevenT6Vet; Jul 16, 2005 at 08:17 PM.
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Old Jul 16, 2005 | 09:29 PM
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Originally Posted by SevenT6Vet
the air is coming out just a little out of the bottom, middle, and top vents all at once
That would be the default mode,most commonly caused by a vacuum leak
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Old Jul 17, 2005 | 12:53 PM
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SOB, I have owned the car for two years, and I go to jack it up to take off the wheel and realize the previous owner never gave me the lug nut key!!!

UGH!

So I'm emailing the previous owner (the CEO of a company I left to go to a competitor's company, just to add to the drama) and simultaneously sending off $10 to AMCOR with my key code.
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Old Jul 18, 2005 | 05:20 PM
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Originally Posted by SevenT6Vet
SOB, I have owned the car for two years, and I go to jack it up to take off the wheel and realize the previous owner never gave me the lug nut key!!!

UGH!

So I'm emailing the previous owner (the CEO of a company I left to go to a competitor's company, just to add to the drama) and simultaneously sending off $10 to AMCOR with my key code.
Unless you've got custom wheels, the Chevy dealer can get the locking nuts off and sell you a new set w/ a new locking nut for about $25.
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Old Jul 19, 2005 | 07:16 PM
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Originally Posted by SevenT6Vet
SOB, I have owned the car for two years, and I go to jack it up to take off the wheel and realize the previous owner never gave me the lug nut key!!!

UGH!

So I'm emailing the previous owner (the CEO of a company I left to go to a competitor's company, just to add to the drama) and simultaneously sending off $10 to AMCOR with my key code.
Have you already checked in the regular rear compartment location for it? Pop out your center compartment cover and look along the left hand (driver's side) edge of the well. There is a small "pocket" in the carpet a few inches behind the latch where they are normally stored. HTH.
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Old Jul 20, 2005 | 07:36 AM
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Originally Posted by LoneStarFRC
Have you already checked in the regular rear compartment location for it? Pop out your center compartment cover and look along the left hand (driver's side) edge of the well. There is a small "pocket" in the carpet a few inches behind the latch where they are normally stored. HTH.
LOL...I'll look when I get home, but if I find it, I may be even more frustrated! Thanks though, I will look. I didn't even know there was a subcompartment there!
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Old Jul 21, 2005 | 08:53 AM
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Originally Posted by SevenT6Vet
LOL...I'll look when I get home, but if I find it, I may be even more frustrated! Thanks though, I will look. I didn't even know there was a subcompartment there!
Found it...never knew it was there!

Thanks!
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Old Jul 21, 2005 | 05:36 PM
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Originally Posted by SevenT6Vet
Found it...never knew it was there!

Thanks!
Swut we're here 4!
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