Automatic Climate Control
Instructor
Joined: Feb 2011
Posts: 230
Likes: 0
From: Mission Viejo CA
Race Director
Joined: Mar 2005
Posts: 10,399
Likes: 26
From: Austin Texas
???? When it is a little cold down here,i just turn the **** to 90 degrees and the heat comes from the floor vents.Thats the way it should work on AUTO.And do what post 12 said because the sensor is up front somewhere & I'm thinking it might get dirty.I've done that a few times & the temp resets.
Team Owner
Joined: Sep 2000
Posts: 25,025
Likes: 2,716
From: Far NW 'burbs of Chicago
St. Jude Donor '13
Everything will power up (fuel pump, headlights if dark, etc) but the engine doesn't start.
Le Mans Master
Joined: Jan 2008
Posts: 6,457
Likes: 297
From: corpus christi Texas
Melting Slicks
Joined: Dec 2006
Posts: 2,694
Likes: 106
That's the 'recirc' button man. Just received my documents and manuals, and this HVAC, although the ugliest I've had, it's the best 
. To turn the system off, you just push the temperature selector. And that works for the passenger side too. And best of all, besides being able to change from fresh to recirc mode with HVAC off (like most systems, except BMW), you can also change the temperature. Nice.
. To turn the system off, you just push the temperature selector. And that works for the passenger side too. And best of all, besides being able to change from fresh to recirc mode with HVAC off (like most systems, except BMW), you can also change the temperature. Nice.
Le Mans Master
Joined: Jan 2008
Posts: 6,457
Likes: 297
From: corpus christi Texas
That's the 'recirc' button man. Just received my documents and manuals, and this HVAC, although the ugliest I've had, it's the best . To turn the system off, you just push the temperature selector. And that works for the passenger side too. And best of all, besides being able to change from fresh to recirc mode with HVAC off (like most systems, except BMW), you can also change the temperature. Nice.
. To turn the system off, you just push the temperature selector. And that works for the passenger side too. And best of all, besides being able to change from fresh to recirc mode with HVAC off (like most systems, except BMW), you can also change the temperature. Nice.
Safety Car
Joined: Mar 2009
Posts: 4,101
Likes: 719
From: Northeast MA & Mad Beach FL
Kind of hard to explain this, but I think I have a problem with my climate control system. Whenever I turn on my heaters, all I get is constant coolish warm air coming out of the vents. The temperature settings between 61 to 85 feels the same. But from 85 to 90, there is some heat coming out, but not hot. I would think that if the system is operating normal, the temperature should get a little hotter with each digit going up in increments. The car was definitely warmed up and the AC was OFF. Has anyone ever experienced this before?
At times I was also thinking there must be something wrong.
Not ruling out that something actually "is" wrong, but, IMO, I think the following post explains it because from my experience I came to the same conclusion .. for what it's worth.
The temp settings aren't supposed to be the temp of the air coming out of the vents. The temp setting is for the desired temp inside the car. The temp inside the car is determined by sensors in the cabin.
Ex.; If it's sunny and 75° and you set the desired temp at 75° the A/C will come on (cool air) until the interior gets to 75°. If it's sunny and 40° outside and you set the desired temp at 75° the heater (warm air) will come out of the vent until the interior temp reaches 75°.
Here in Austin I've had the A/C kick in on a sunny day when the outside temperature is 60 and the desired inside temp set at 78°. Between the heat from the exhaust and the firewall and the heat from the sun the car needs A/C on a 60° day to maintain 78° inside..
Ex.; If it's sunny and 75° and you set the desired temp at 75° the A/C will come on (cool air) until the interior gets to 75°. If it's sunny and 40° outside and you set the desired temp at 75° the heater (warm air) will come out of the vent until the interior temp reaches 75°.
Here in Austin I've had the A/C kick in on a sunny day when the outside temperature is 60 and the desired inside temp set at 78°. Between the heat from the exhaust and the firewall and the heat from the sun the car needs A/C on a 60° day to maintain 78° inside..
The one constant I find is when it's cool/cold out and Not sunny, the system works like I would expect it to from a cold start and just starting out for a drive.
And other times making adjustments after driving around for a while, with the temperature already established in the car as you say :
"Between the heat from the exhaust and the firewall and the heat from the sun the car needs A/C on a 60° day to maintain 78° inside"
it seems all that affects how the system reacts trying to automatically attain the temperature it is set to.
It's doing what it's supposed to, just doesn't seem like it.
For me, unless it's really cold out, I rarely have to set the heat higher than 68.
I'm usually running the AC to keep it from getting too warm, even when it is cool/cold out
Just my thoughts and experience for what it's worth
Safety Car
Joined: Jul 2004
Posts: 3,867
Likes: 307
From: Wantagh,L.I. New York
Try the simple solutions, disconnect battery for 30 minutes/ hold a number of buttons for whatever. If that don't work you probably have a torn shroud and/or one or more bad actuators. The C6 has no doors. It have a large shroud that moves back and forth propelled by the actuators. The shroud is like a large roll of 35 mm film.
My HVAC (2005) went nuts a few years ago. The shroud and both actuators were replaced. Bad news is that the dash has to come off. Had it done by my local Caddy dealer under ex warranty. Cost w/o warranty $1550. I chose the Caddy dealer over Chevy dealer because they were able to diagnose the problem while my Chevy dealer was just blowing smoke. The Caddy XLR has the same unit and they had some experience , none with the Chevy dealer. When the dash is removed don't go to the dealer to see it, it will make you sick.
I have the old shroud in my garage, it was badly torn .
Good Luck
My HVAC (2005) went nuts a few years ago. The shroud and both actuators were replaced. Bad news is that the dash has to come off. Had it done by my local Caddy dealer under ex warranty. Cost w/o warranty $1550. I chose the Caddy dealer over Chevy dealer because they were able to diagnose the problem while my Chevy dealer was just blowing smoke. The Caddy XLR has the same unit and they had some experience , none with the Chevy dealer. When the dash is removed don't go to the dealer to see it, it will make you sick.
I have the old shroud in my garage, it was badly torn .
Good Luck
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