[Kamaro223]

One more reason these cars are junk. I have similar issues and I do not agree they are normal. It has more to do with the temperature of the air rather then the flow. I routinely drive for 4 hours straight and due to the boredom of the drive, I have nothing better to do than listen to all the "normal" rattles, clunks, wind noise and monitor the temperature. Last time I did this drive, just about 10 days ago, it was 46F out for almost the entire drive. I left work and the temp was set at about 75ish with fresh air on and AC off. After about 15-20 minutes it was warm enough to turn it down. I usually turn it down in two degree increments. If I do anymore than two, ice cold air comes out and then slowly warms up until it is too hot in the car. This last trip I continued this trend in single degree increments all the way to LO. LO was the only setting that didn't blow hot air out of the vent and make the car uncomfortably hot to be in. LO made the car uncomfortably cold to sit in and as you know, turning it off does shit. This is the only car I've ever owned that has acted this way. I used to drive a 2006 G35, a 2014 SS and a 2002 Ram on this route, and after about the initial adjustment, one...maybe two more would set you up for the whole trip. I want to get a digital thermometer and monitor this more scientifically, but instead, I think I'm going to start a GoFundMe for a custom wrap in a nice shade of brown so this thing more accurately represents the piece of shit it really is. For now, I will try the recirc setting recommended in this thread.

[Gunkk]

Originally Posted by Obzen

This is the standard way car air systems work.

Nope. Not for hyundai, toyota, honda.... it’s a crappy (GM) design thing.

[Obzen]

Originally Posted by Gunkk

Nope. Not for hyundai, toyota, honda.... it’s a crappy (GM) design thing.

Oh really? So the Hyundai I drive every day that works the same way was designed by GM?

Good to know.

[solobaric]

Originally Posted by Gunkk

Nope. Not for hyundai, toyota, honda.... it’s a crappy (GM) design thing.

Yeah my Toyota daily driver and F150 dont work this way.

[Nsxmatt]

Originally Posted by Gunkk

Nope. Not for hyundai, toyota, honda.... it’s a crappy (GM) design thing.

I've worked for Honda for 15 years and owned 36 of them, it does it on every single one along with every other type of car I've ever owned or driven.

[Norm Peterson]

Originally Posted by Gunkk

Nope. Not for hyundai, toyota, honda.... it’s a crappy (GM) design thing.

I strongly doubt it's as all or nothing as that. More likely it's something that for some other reason is more noticeable in some cars than others. It's much worse in my wife's Subie than it is in the Mustang, but even the Mustang still does the heating-when-off thing if the HVAC temp setting is off the cold-side stop (a Ford with HVAC by GM? I think not).

I'll bet that the 6th gen "dash-level" vent location makes it much more noticeable if you use the shift lever much.


Norm

[Nsxmatt]

Originally Posted by Norm Peterson

I strongly doubt it's as all or nothing as that. More likely it's something that for some other reason is more noticeable in some cars than others.

It has a lot to do with the outside air inlet location and the amount of air that is forced in at speed. Most are located at the base of the windshield.

I honestly don't get how people can drive cars for any amount of time and not get that when the outside vent is open, AIR WILL COME IN EVEN IF ITS OFF. Come on people, you can't be this ignorant!

[Kise]

Originally Posted by lt4camaro

The electric grid power switch for the back glass should always default to off on a shut off and restart of the engine. Should always require manual activation after start up.

my 2ss automatically turns on the rear defog as well.

[Kise]

Originally Posted by Gunkk

Nope. Not for hyundai, toyota, honda.... it’s a crappy (GM) design thing.

did it in my charger exactly the same it does in my 2ss but it doesn't in my Silverado ss

[Need4Camaro]

Originally Posted by Kise

my 2ss automatically turns on the rear defog as well.

Originally Posted by lt4camaro

The electric grid power switch for the back glass should always default to off on a shut off and restart of the engine. Should always require manual activation after start up.

Originally Posted by Bad Anvil Garage

What about the rear defogger turning itself on automatically at times upon startup? Anyone ever have that issue?

@lt4camaro - This is not true. The owners manual states that under certain conditions it WILL come on automatically regardless if its a cold start or a warm start. It is not an issue, it is functioning as intended.

Both of my 6th Gen Camaro's have done this as well and the owners manual states they are supposed to. Supposedly the car measures the temperature and determines whether it will activate it or not...so it will not ALWAYS come on, but it is more likely during a cold morning start.

[Navigator]

Originally Posted by Nsxmatt

I honestly don't get how people can drive cars for any amount of time and not get that when the outside vent is open, AIR WILL COME IN EVEN IF ITS OFF. Come on people, you can't be this ignorant!

Is this an older car thing? For younger people around here, that design frankly makes no sense. Just like at home I expect no heat/AC to be running when I have the thermostat set to off, I also expect in my car that there will be no heat/AC when I have the HVAC button set to off. If I want it on, I will turn it on. They really need to remove that middle power button, as it seems pointless to me. To be honest I'm still not sure what it does even after all these explanations above.

[Nsxmatt]

Originally Posted by Navigator

Is this an older car thing? For younger people around here, that design frankly makes no sense. Just like at home I expect no heat/AC to be running when I have the thermostat set to off, I also expect in my car that there will be no heat/AC when I have the HVAC button set to off. If I want it on, I will turn it on. They really need to remove that middle power button, as it seems pointless to me. To be honest I'm still not sure what it does even after all these explanations above.

If you don't understand after everything everyone has posted, I'm sorry but you're never going to understand it. Just make sure the recirculation button is always pressed and lit and air will never come out while the system is off.

[Navigator]

Originally Posted by Nsxmatt

If you don't understand after everything everyone has posted, I'm sorry but you're never going to understand it. Just make sure the recirculation button is always pressed and lit and air will never come out while the system is off.

Understood what to do....yes

Does it make any sense...no

What if I want zero air movement at all? Do I have to manually close all the vents then?

[mcintyre1969]

Seems to me if air was not coming in, you couldn't drive all that far without passing out from lack of Oxygen