# Max AC setting **URL:** \ **Category:** General Discussion\ **Created:** [September 26, 2019, 4:45pm UTC](https://community.cartalk.com/t/max-ac-setting/149537 "2019-09-26T16:45:50Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![Steve\_Kass](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/steve_kass/32/17646_2.png) [@Steve\_Kass](https://community.cartalk.com/u/Steve_Kass)\ **Post date:** [September 26, 2019, 4:45pm UTC](https://community.cartalk.com/t/max-ac-setting/149537/1 "2019-09-26T16:45:50Z")
Wondering why Max AC setting allows outside air to enter. I know it is only a small amount but what is the reason at all? ---
**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\ **Post date:** [September 26, 2019, 4:49pm UTC](https://community.cartalk.com/t/max-ac-setting/149537/2 "2019-09-26T16:49:33Z")
> [@Steve\_Kass](#): > > Max AC setting allows outside air to enter How do you know this? Not ALL cars operate the same way so which car are you referring to? ---
**Author:** ![Steve\_Kass](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/steve_kass/32/17646_2.png) [@Steve\_Kass](https://community.cartalk.com/u/Steve_Kass)\ **Post date:** [September 26, 2019, 5:43pm UTC](https://community.cartalk.com/t/max-ac-setting/149537/3 "2019-09-26T17:43:30Z")
All cars have this setting on max air. Steve Jobs was a visionary ---
**Author:** ![VOLVO-V70](https://avatars.discourse-cdn.com/v4/letter/v/8e8cbc/32.png) [@VOLVO-V70](https://community.cartalk.com/u/VOLVO-V70)\ **Post date:** [September 26, 2019, 5:46pm UTC](https://community.cartalk.com/t/max-ac-setting/149537/4 "2019-09-26T17:46:55Z")
Steve , your post makes no sense . What is this vehicle and why do you think this is a problem . The air conditioner should use outside air unless you put it on recirculate ( that only uses inside air ). ---
**Author:** ![Rod-Knox](https://avatars.discourse-cdn.com/v4/letter/r/a183cd/32.png) [@Rod-Knox](https://community.cartalk.com/u/Rod-Knox)\ **Post date:** [September 26, 2019, 5:49pm UTC](https://community.cartalk.com/t/max-ac-setting/149537/5 "2019-09-26T17:49:18Z")
Law requires that there is constant fresh air venting into a car and stale air exhausting regardless of the HVAC settings. ---
**Author:** ![Steve\_Kass](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/steve_kass/32/17646_2.png) [@Steve\_Kass](https://community.cartalk.com/u/Steve_Kass)\ **Post date:** [September 26, 2019, 5:59pm UTC](https://community.cartalk.com/t/max-ac-setting/149537/6 "2019-09-26T17:59:38Z")
Thanks Rod, sounds like that might be it. ---
**Author:** ![Steve\_Kass](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/steve_kass/32/17646_2.png) [@Steve\_Kass](https://community.cartalk.com/u/Steve_Kass)\ **Post date:** [September 26, 2019, 6:01pm UTC](https://community.cartalk.com/t/max-ac-setting/149537/7 "2019-09-26T18:01:00Z")
Incorrect, recirculate uses some outside air as I just learned it is a federal law that fresh air be mixed in. ---
**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\ **Post date:** [September 26, 2019, 6:04pm UTC](https://community.cartalk.com/t/max-ac-setting/149537/8 "2019-09-26T18:04:21Z")
Max A/C generally actuates the recic mode. > [@Steve\_Kass](#): > > I just learned it is a federal law that fresh air be mixed in. The A/C housings that I work with seal off outside air petty well, where did you learn about A/C systems? ---
**Author:** ![Whitey](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/whitey/32/24680_2.png) [@Whitey](https://community.cartalk.com/u/Whitey)\ **Post date:** [September 26, 2019, 6:16pm UTC](https://community.cartalk.com/t/max-ac-setting/149537/9 "2019-09-26T18:16:24Z")
A fresh air supply keeps you from asphyxiating. ---
**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\ **Post date:** [September 27, 2019, 2:28am UTC](https://community.cartalk.com/t/max-ac-setting/149537/10 "2019-09-27T02:28:13Z")
Ray talked about this on the radio program, that even in max mode auto AC systems still allow some fresh air into the mix. But not as much as the non-max modes. ---
**Author:** ![db4690](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/db4690/32/2583_2.png) [@db4690](https://community.cartalk.com/u/db4690)\ **Post date:** [September 27, 2019, 3:08am UTC](https://community.cartalk.com/t/max-ac-setting/149537/11 "2019-09-27T03:08:03Z")
> [@Steve\_Kass](#): > > All cars have this setting on max air. > > Steve Jobs was a visionary I agree that Steve Jobs was a very smart guy who was to some degree able to foresee what people wanted and needed before anybody else That said . . . what the heck does Steve Jobs have to do with max ac . . . ?! ---
**Author:** ![Whitey](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/whitey/32/24680_2.png) [@Whitey](https://community.cartalk.com/u/Whitey)\ **Post date:** [September 27, 2019, 3:13am UTC](https://community.cartalk.com/t/max-ac-setting/149537/12 "2019-09-27T03:13:25Z")
> [@Steve\_Kass](#): > > Steve Jobs was a visionary Steve Jobs accomplished more in his lifetime than I probably will, but he was a flawed human being, just like the rest of us. ---
**Author:** ![Steve\_Kass](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/steve_kass/32/17646_2.png) [@Steve\_Kass](https://community.cartalk.com/u/Steve_Kass)\ **Post date:** [September 27, 2019, 4:21am UTC](https://community.cartalk.com/t/max-ac-setting/149537/13 "2019-09-27T04:21:34Z")
I remember that episode. Just wondering why it allows outside air in. Steve Jobs was a visionary ---
**Author:** ![texases](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/texases/32/862_2.png) [@texases](https://community.cartalk.com/u/texases)\ **Post date:** [September 27, 2019, 6:10am UTC](https://community.cartalk.com/t/max-ac-setting/149537/14 "2019-09-27T06:10:56Z")
To make sure that there’s no chance of CO2 excess? Striving for hours with no fresh air added would not be good, I’d think. ---
**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\ **Post date:** [September 27, 2019, 6:53am UTC](https://community.cartalk.com/t/max-ac-setting/149537/15 "2019-09-27T06:53:03Z")
> [@George\_San\_Jose1](#): > > Ray talked about this on the radio program, that even in max mode auto AC systems still allow some fresh air into the mix. The advice on the radio program is based on repair experiences from the 1970’s and 1980’s. The next time you have a blower housing out take a look at the doors and rubber seals. Modern ATC systems select fresh/recirc based on inputs from temperature and pollution sensors, these systems are much more advanced than the systems of the 1980’s. As far as asphyxiation it is expected that a door will be opened every couple of hours. If someone were to sleep in a car the doors would be closed for perhaps 8 hours, do people die while sleeping in parked cars? ---
**Author:** ![Whitey](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/whitey/32/24680_2.png) [@Whitey](https://community.cartalk.com/u/Whitey)\ **Post date:** [September 27, 2019, 10:09am UTC](https://community.cartalk.com/t/max-ac-setting/149537/16 "2019-09-27T10:09:13Z")
> [@Steve\_Kass](#): > > Steve Jobs was a visionary He was so visionary that he shunned modern medicine and paid the ultimate price for it. ---
**Author:** ![FoDaddy](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/fodaddy/32/717_2.png) [@FoDaddy](https://community.cartalk.com/u/FoDaddy)\ **Post date:** [September 27, 2019, 12:55pm UTC](https://community.cartalk.com/t/max-ac-setting/149537/17 "2019-09-27T12:55:09Z")
> [@Steve\_Kass](#): > > Steve Jobs was a visionary If by “visionary” you mean “take an existing product/someone else’s idea, put’s an aesthetically pleasing case on it, and add a hefty markup.” Then yes, he was a visionary. ---
**Author:** ![shadowfax](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/shadowfax/32/13026_2.png) [@shadowfax](https://community.cartalk.com/u/shadowfax)\ **Post date:** [September 27, 2019, 2:18pm UTC](https://community.cartalk.com/t/max-ac-setting/149537/18 "2019-09-27T14:18:39Z")
Don’t forget “screwed Wozniak out of his rightfully-earned money even though without Woz Jobs would be a used car salesman.” ---
**Author:** ![PvtPublic](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/pvtpublic/32/13089_2.png) [@PvtPublic](https://community.cartalk.com/u/PvtPublic)\ **Post date:** [September 27, 2019, 2:29pm UTC](https://community.cartalk.com/t/max-ac-setting/149537/19 "2019-09-27T14:29:12Z")
> [@Nevada\_545](#): > > Modern ATC systems select fresh/recirc based on inputs from temperature and pollution sensors, these systems are much more advanced than the systems of the 1980’s. Pollution sensors? Really? I guess I do learn something new every day. 🙂 ---
**Author:** ![VDCdriver](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/vdcdriver/32/30_2.png) [@VDCdriver](https://community.cartalk.com/u/VDCdriver)\ **Post date:** [September 27, 2019, 2:30pm UTC](https://community.cartalk.com/t/max-ac-setting/149537/20 "2019-09-27T14:30:55Z")
> [@shadowfax](#): > > Don’t forget “screwed Wozniak out of his rightfully-earned money even though without Woz Jobs would be a used car salesman.” Let us not forget that this “visionary” also treated his daughter miserably: > **[The daughter Steve Jobs denied: ‘Clearly I was not compelling enough for my...](https://www.theguardian.com/global/2018/sep/01/daughter-steve-jobs-denied-lisa-brennan-jobs)** > > Lisa Brennan-Jobs talks about how she learned to love the co-founder of Apple, who claimed for years she wasn’t his child 🤔 [Next page](https://community.cartalk.com/t/max-ac-setting/149537.md?page=2)