A/C Auto ?/Comment
Thread Starter
Melting Slicks
Joined: Aug 2000
Posts: 3,436
Likes: 977
From: Overland Park KS
A/C Auto ?/Comment
In Auto A/C mode, I believe that my car is staying in Recirculation mode constantly and not changing to 'fresh air' mode; this regardless of how low the outside temp is.
I've checked by pushing the Auto button when it's already lit and the graphic always show the a/c to be in Recirculation mode. When I then push the Recirc button itself I can of course get the car into fresh air mode, but obviously the Auto mode is then off; ( although I still think that the fan speed is automatically controlled).
My question then: is the car constantly staying in Recirc mode, which obviously it should not be doing, and is it just my car or are others noticing the same thing?
TIA,
Bish
I've checked by pushing the Auto button when it's already lit and the graphic always show the a/c to be in Recirculation mode. When I then push the Recirc button itself I can of course get the car into fresh air mode, but obviously the Auto mode is then off; ( although I still think that the fan speed is automatically controlled).
My question then: is the car constantly staying in Recirc mode, which obviously it should not be doing, and is it just my car or are others noticing the same thing?
TIA,
Bish
Instructor
Joined: Apr 2015
Posts: 239
Likes: 113
Well Bish you raised a good question. So I took my Z out and drove a 40 plus mile test Ring around Sedona AZ. The short answer is the AC remained in Recirculate all the time while in Auto. However, it may not have been a fair test. It was 102F when I left my house then driving around 11 traffic circles and traffic in Up Town, stop and go. Then several WOT to 110 mph while cruising at 75/80. The next city Cottonwood was 105F and Cornville was 106F. I had the AC set 72F on sync and the seat fan on high. One run at 105F uphill WOT to 131 mph with full brakes to normal speed. Highest Coolent Temp 221, mostly at 116/118F, highest A8 Trans Temp 150F, so much for overheating! My Z06/7 A8 has 1350 miles, 15/50 Mobil, no under radiator aero Pan installed. I had it in Sport, Drive using Paddles at every circle and stop, and some Manual Paddles when necessary. This is an amazing wonderful car to drive.
Thread Starter
Melting Slicks
Joined: Aug 2000
Posts: 3,436
Likes: 977
From: Overland Park KS
Well Bish you raised a good question. So I took my Z out and drove a 40 plus mile test Ring around Sedona AZ. The short answer is the AC remained in Recirculate all the time while in Auto. However, it may not have been a fair test. It was 102F when I left my house then driving around 11 traffic circles and traffic in Up Town, stop and go. Then several WOT to 110 mph while cruising at 75/80. The next city Cottonwood was 105F and Cornville was 106F. I had the AC set 72F on sync and the seat fan on high. One run at 105F uphill WOT to 131 mph with full brakes to normal speed. Highest Coolent Temp 221, mostly at 116/118F, highest A8 Trans Temp 150F, so much for overheating! My Z06/7 A8 has 1350 miles, 15/50 Mobil, no under radiator aero Pan installed. I had it in Sport, Drive using Paddles at every circle and stop, and some Manual Paddles when necessary. This is an amazing wonderful car to drive.
Bish
Safety Car
Joined: Mar 2003
Posts: 4,527
Likes: 373
From: Philadelphia PA
In auto mode a/c mode, I believe its more efficient to be in recirc mode, as it can be maintained more effectively, since you're just recirculating cool air.
I know in my wifes car (Toyota), when you hit the auto and a/c, it automatically puts it in recirc mode too. Although, if I click on the recirc button, it will bring in fresh air and it won't go off auto unless I adjust the fan.
Does the manual provide any explanation?
I know in my wifes car (Toyota), when you hit the auto and a/c, it automatically puts it in recirc mode too. Although, if I click on the recirc button, it will bring in fresh air and it won't go off auto unless I adjust the fan.
Does the manual provide any explanation?
Thread Starter
Melting Slicks
Joined: Aug 2000
Posts: 3,436
Likes: 977
From: Overland Park KS
In auto mode a/c mode, I believe its more efficient to be in recirc mode, as it can be maintained more effectively, since you're just recirculating cool air.
I know in my wifes car (Toyota), when you hit the auto and a/c, it automatically puts it in recirc mode too. Although, if I click on the recirc button, it will bring in fresh air and it won't go off auto unless I adjust the fan.
Does the manual provide any explanation?
I know in my wifes car (Toyota), when you hit the auto and a/c, it automatically puts it in recirc mode too. Although, if I click on the recirc button, it will bring in fresh air and it won't go off auto unless I adjust the fan.
Does the manual provide any explanation?
Really surprised more people aren't 'talking' about this issue. Perhaps they're unaware?
Bish
Le Mans Master
Joined: Sep 2000
Posts: 5,027
Likes: 320
From: N. CA
I just hit the recirc. button and it takes it out of that mode.
I believe it will continue to operate the A/C accordingly as before.
Yes, the Auto light will be off since you have recirc. off, but everything else will be the same.
To me this is a bigger issue!
https://www.corvetteforum.com/forums...-air-temp.html
I believe it will continue to operate the A/C accordingly as before.
Yes, the Auto light will be off since you have recirc. off, but everything else will be the same.
To me this is a bigger issue!
https://www.corvetteforum.com/forums...-air-temp.html
Last edited by BOBSZ06; Jun 22, 2015 at 05:55 PM.
Melting Slicks
Joined: Oct 2007
Posts: 2,398
Likes: 858
I just hit the recirc. button and it takes it out of that mode.
I believe it will continue to operate the A/C accordingly as before.
Yes, the Auto light will be off since you have recirc. off, but everything else will be the same.
To me this is a bigger issue!
https://www.corvetteforum.com/forums...-air-temp.html
I believe it will continue to operate the A/C accordingly as before.
Yes, the Auto light will be off since you have recirc. off, but everything else will be the same.
To me this is a bigger issue!
https://www.corvetteforum.com/forums...-air-temp.html
I didn't read the whole thread about the bigger issue above. But I think the issue can be resolved by rotating the fan speed all the way down (left) until it reads "off". This stops the air flow coming into the cabin. The Auto and AC buttons as well as the temp selection **** are independent (mostly). So unless you stop the fan by turning it off it will blow warm/hot air if you have turned the AC compressor off.
This was covered in another thread as well.
Le Mans Master
Joined: Sep 2000
Posts: 5,027
Likes: 320
From: N. CA
Hi Bob;
I didn't read the whole thread about the bigger issue above. But I think the issue can be resolved by rotating the fan speed all the way down (left) until it reads "off". This stops the air flow coming into the cabin. The Auto and AC buttons as well as the temp selection **** are independent (mostly). So unless you stop the fan by turning it off it will blow warm/hot air if you have turned the AC compressor off.
This was covered in another thread as well.
I didn't read the whole thread about the bigger issue above. But I think the issue can be resolved by rotating the fan speed all the way down (left) until it reads "off". This stops the air flow coming into the cabin. The Auto and AC buttons as well as the temp selection **** are independent (mostly). So unless you stop the fan by turning it off it will blow warm/hot air if you have turned the AC compressor off.
This was covered in another thread as well.
The intent of the link to the "bigger issue" is that the outside air being brought into the car is heated (evidently by a hot firewall area like an oven) even when the temp is at "LO" and A/C off.
I like to have my cooler outside air (cool climate) brought into the car with the fan "ON" not off, but that is not possible.
With the fan "OFF" there is no way to provide outside air circulation into the car.
Yes, I now keep windows open a lot more than in the past.
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Melting Slicks
Joined: Oct 2007
Posts: 2,398
Likes: 858
The intent of the link to the "bigger issue" is that the outside air being brought into the car is heated (evidently by a hot firewall area like an oven) even when the temp is at "LO" and A/C off.
I like to have my cooler outside air (cool climate) brought into the car with the fan "ON" not off, but that is not possible.
With the fan "OFF" there is no way to provide outside air circulation into the car.
Yes, I now keep windows open a lot more than in the past.
I like to have my cooler outside air (cool climate) brought into the car with the fan "ON" not off, but that is not possible.
With the fan "OFF" there is no way to provide outside air circulation into the car.
Yes, I now keep windows open a lot more than in the past.
Funny though I don't recall it doing that this past winter and spring when the compressor was off. But then again maybe it was and I didn't notice.