Auto Climate Control turns on randomly - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

cantaloupe · 11-06-2012, 12:37 PM

Anyone else encounter this issue? The ac will randomly turn on even though I know I turned it off. Happened a couple times and thought I was going crazy. Never seen this issue until this morning.

ashtray · 11-06-2012, 01:25 PM

Do you have it set to "auto"?

Used the front defroster? I know in most cars, the front defroster (defogger?? Whatever) will use the AC - and in some cars when you switch the controls back to vents, the AC will stay on. Not sure how this one works offhand.

Rayme · 11-06-2012, 01:27 PM

AC will turn on automatically in certain car when at the windshield defroster settings. Not sure about the FR-S yet.

cantaloupe · 11-06-2012, 02:19 PM

Nope, I pressed the "off" button then only hit the recycled air button. Couple minutes later, the ac will turn on by itself. Will do some more testing later.

rapidcars · 11-06-2012, 02:29 PM

Happens to me all the time also. Was wondering the same thing. I knew about it turning on for the defroster but I know for certain that it has come on when I haven't used it at all.

Lytheum · 11-09-2012, 03:52 PM

i know in my mazdaspeed 3 the a/c would cycle the compressor no matter what setting you had it on. it was normal with the auto climate control.

Longhorn248 · 11-09-2012, 10:20 PM

This makes me glad that I have to turn a dial in order to run my A/C.

White64Goat · 11-09-2012, 10:48 PM

Mine has switched all by itself too. I had the unit set to 70 degrees last weekend and the vents set to feet & face with the blower set to the second speed. When I went to leave later in the day I noticed the vents were now on feet and defrost, the 'auto' was lit up and the fan speed was now at 3. Haven't had time to read the owners manual fully yet....

BRZfan · 11-10-2012, 07:47 AM

I'd be happy to help out, research the owner's manual, and determine if there is a solution there, BUT, I have the manual system (Premium model) and it does what I tell it to do

, no exceptions.

Turbowned · 11-10-2012, 09:27 AM

RTFM, you should hopefully understand then. The system is designed to make temperature control easier, not harder, I promise you. I'ts not new tech, either. My friend's 1990 Supra has auto climate control. My Mercedes is always set to 72; set it and forget it.

BMWDavid · 11-10-2012, 09:31 AM

OK...here is my take on this. There are two auto functions. The first is a full auto and is selected by pushing the auto button. You will then see the auto indicator in the display go to a highlighted display.

In full auto the climate control has full control of the system to maintain the set temp. It will select the fan speed, air direction, a/c compressor and the recycle funtion

Now...if you turn off the a/c by toggling the a/c switch the system is still in a reduced auto function and this is shown by the auto indicator now being just the word auto and not highlighted.

In this mode the system will still select fan speeds and direct air flow. Hence the changing settings.

Draco-REX · 11-10-2012, 12:44 PM

Strange. I hit Auto and then the AC button and it stays off.

chenshuo · 03-12-2013, 07:51 PM

Quote:

Originally Posted by BMWDavid

Now...if you turn off the a/c by toggling the a/c switch the system is still in a reduced auto function and this is shown by the auto indicator now being just the word auto and not highlighted.

is there a way to change the "reduced auto" function to not-auto? i my A/C always turn on when i turn on climate control no matter what air flow setting i set.

BMWDavid · 03-13-2013, 08:50 PM

Quote:

Originally Posted by chenshuo

is there a way to change the "reduced auto" function to not-auto? i my A/C always turn on when i turn on climate control no matter what air flow setting i set.

Not sure what you are saying...but if you set the air direction (floor, face, etc) on my car it will still try to mainatin the temp via fan speed and if the a/c is toggled on it will cycle the compressor.

Now...if you manually set a fan speed I've seen the fan speed increase to try and overcome a large temp delta between temp setting and ambient.

This is how my car acts.

11-06-2012, 12:37 PM	#1
cantaloupe Member Join Date: Sep 2012 Drives: brz Location: california Posts: 66 Thanks: 0 Thanked 3 Times in 2 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Auto Climate Control turns on randomly Anyone else encounter this issue? The ac will randomly turn on even though I know I turned it off. Happened a couple times and thought I was going crazy. Never seen this issue until this morning.

11-06-2012, 02:29 PM	#5
rapidcars Senior Member Join Date: Aug 2012 Drives: 2013 DGM BRZ Limited Location: Long Island, NY Posts: 212 Thanks: 150 Thanked 111 Times in 59 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Happens to me all the time also. Was wondering the same thing. I knew about it turning on for the defroster but I know for certain that it has come on when I haven't used it at all. __________________

11-09-2012, 03:52 PM	#6
Lytheum Senior Member Join Date: Mar 2012 Drives: 2013 BRZ Premium 6MT Location: Ohio Posts: 427 Thanks: 49 Thanked 103 Times in 54 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	i know in my mazdaspeed 3 the a/c would cycle the compressor no matter what setting you had it on. it was normal with the auto climate control. __________________ 2013 Subaru BRZ Premium 6MT -STOCK!

11-10-2012, 09:31 AM	#11
BMWDavid Senior Member Join Date: Feb 2012 Drives: '89 911, '06 GTI, '13 BRZ Location: USA Posts: 313 Thanks: 40 Thanked 62 Times in 40 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	OK...here is my take on this. There are two auto functions. The first is a full auto and is selected by pushing the auto button. You will then see the auto indicator in the display go to a highlighted display. In full auto the climate control has full control of the system to maintain the set temp. It will select the fan speed, air direction, a/c compressor and the recycle funtion Now...if you turn off the a/c by toggling the a/c switch the system is still in a reduced auto function and this is shown by the auto indicator now being just the word auto and not highlighted. In this mode the system will still select fan speeds and direct air flow. Hence the changing settings. __________________ 2005 Honda XR650L 1989 Porsche Carrera 3.2 Coupe 2006 VW GTI/DSG 2013 Subaru BRZ WRB Limited 6MT-gone but not forgotten 2014 Nissan Murano SV

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11-06-2012, 01:25 PM	#2
ashtray As Seen On The Internet Join Date: Apr 2011 Drives: 2003 WRX, 2013 BRZ, 442 Location: SoCal Posts: 852 Thanks: 23 Thanked 251 Times in 159 Posts Mentioned: 1 Post(s) Tagged: 2 Thread(s)	Do you have it set to "auto"? Used the front defroster? I know in most cars, the front defroster (defogger?? Whatever) will use the AC - and in some cars when you switch the controls back to vents, the AC will stay on. Not sure how this one works offhand.

11-06-2012, 01:27 PM	#3
Rayme The Answer Join Date: Sep 2012 Drives: Mazda 2 Location: Moncton, NB Posts: 1,233 Thanks: 488 Thanked 661 Times in 315 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	AC will turn on automatically in certain car when at the windshield defroster settings. Not sure about the FR-S yet.

11-06-2012, 02:19 PM	#4
cantaloupe Member Join Date: Sep 2012 Drives: brz Location: california Posts: 66 Thanks: 0 Thanked 3 Times in 2 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Nope, I pressed the "off" button then only hit the recycled air button. Couple minutes later, the ac will turn on by itself. Will do some more testing later.

11-09-2012, 10:48 PM	#8
White64Goat Senior Member Join Date: Jun 2012 Drives: 13 BRZ CBS LTD MT, 02 WRX Location: Fred. Co. Md. Posts: 2,348 Thanks: 65 Thanked 1,111 Times in 627 Posts Mentioned: 19 Post(s) Tagged: 1 Thread(s)	Mine has switched all by itself too. I had the unit set to 70 degrees last weekend and the vents set to feet & face with the blower set to the second speed. When I went to leave later in the day I noticed the vents were now on feet and defrost, the 'auto' was lit up and the fan speed was now at 3. Haven't had time to read the owners manual fully yet....

11-10-2012, 07:47 AM	#9
BRZfan Senior Member Join Date: Oct 2012 Drives: 2013BRZ Premium St Silver Metallic Location: USA Posts: 824 Thanks: 79 Thanked 212 Times in 156 Posts Mentioned: 1 Post(s) Tagged: 1 Thread(s)	I'd be happy to help out, research the owner's manual, and determine if there is a solution there, BUT, I have the manual system (Premium model) and it does what I tell it to do , no exceptions.

11-10-2012, 12:44 PM	#12
Draco-REX Corner Junkie Join Date: Feb 2012 Drives: 13 BRZ, 11 STI, 99 RS Location: Ohio Posts: 2,908 Thanks: 129 Thanked 1,520 Times in 702 Posts Mentioned: 11 Post(s) Tagged: 0 Thread(s)	Strange. I hit Auto and then the AC button and it stays off.

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