Why on Earth does the A/C turn on every time I start the Car

geared · 05-08-2015, 05:21 PM

As the title states - my ac is turning on every time I start the car...even if I hit the off button prior to shutting the car down.

This, in my opinion, is complete stupidity - and I live in South Florida! I have always powered off the AC before shutting any of my cars down. A cold motor trying to crank and turn a compressor on just doesn't seem wise for longevity - it just forces things to work harder, right?

Am I doing something wrong, or I am not getting the point of why BMW did this?

AIRPOWER · 05-08-2015, 05:24 PM

Just how BMW rolls.....get it coded out.

AYF80 · 05-08-2015, 05:26 PM

Quote:

Originally Posted by geared

As the title states - my ac is turning on every time I start the car...even if I hit the off button prior to shutting the car down.

This, in my opinion, is complete stupidity - and I live in South Florida! I have always powered off the AC before shutting any of my cars down. A cold motor trying to crank and turn a compressor on just doesn't seem wise for longevity - it just forces things to work harder, right?

Am I doing something wrong, or I am not getting the point of why BMW did this?

You need to actually click the AC button before turning off the car. The climate control always comes back on, but the AC won't if you turn that off individually.

CaryTheLabelGuy · 05-08-2015, 07:01 PM

Quote:

Originally Posted by geared

As the title states - my ac is turning on every time I start the car...even if I hit the off button prior to shutting the car down.

This, in my opinion, is complete stupidity - and I live in South Florida! I have always powered off the AC before shutting any of my cars down. A cold motor trying to crank and turn a compressor on just doesn't seem wise for longevity - it just forces things to work harder, right?

Am I doing something wrong, or I am not getting the point of why BMW did this?

Honestly, the little bit of paristic drag from the A/C compressor at idle is nothing to an engine and won't cause any premature wear.

I wouldn't give it anymore thought. Have fun and stay "cool"!

Andrew115 · 05-08-2015, 07:39 PM

Hated this also all winter till I turned off the ac button. Now I am quite happy with it since is been in the 80s and I don't drive in the morning.

BaLLzZz · 05-09-2015, 09:16 AM

Supposable the Kool Aid they are feeding the genius over here is this. The HVAC system cycles on at start up because over the years of non-operating systems there seems to be a stale unpleasant smell that will form in internals of the system. So to counteract that they make it cycle on every time you start the car. I do believe it because it does happen in my e46, that smell they are referring to.

I do hate it also and you can get it coded out.

r33_RGSport · 05-09-2015, 10:07 AM

Correctly stated by the other members, It is just a coding away.

Gstone · 05-09-2015, 10:15 AM

Quote:

Originally Posted by AYF80

You need to actually click the AC button before turning off the car. The climate control always comes back on, but the AC won't if you turn that off individually.

This is my experience also.

My AC light does NOT turn on when I start the car if it was off when I turned off the car.

No coding done.

sonicsonic · 05-09-2015, 12:31 PM

Blksnowflake · 05-09-2015, 01:49 PM

Quote:

Originally Posted by AYF80

You need to actually click the AC button before turning off the car. The climate control always comes back on, but the AC won't if you turn that off individually.

Whoa, cool info, thx.

AYF80 · 05-09-2015, 04:05 PM

Quote:

Originally Posted by Blksnowflake

Quote:

Originally Posted by AYF80

You need to actually click the AC button before turning off the car. The climate control always comes back on, but the AC won't if you turn that off individually.

Whoa, cool info, thx.

Ian1973 · 05-11-2015, 10:18 AM

If you have it on auto, then it will need the compressor to keep the cabin at the desired temperature. If it's the winter obviously it won't need it and the compressor wont be on... The summer obviously it will.

Personally I would never not use the auto function. Just set the desired temp and let it go

JNoSol · 05-11-2015, 10:22 AM

Quote:

Originally Posted by sonicsonic

I coded this yesterday. It's so nice that the air doesn't turn on when I turn on the engine, especially spring weather.

05-08-2015, 05:21 PM	#1
geared Major 265 Rep 1,100 Posts Drives: 90' s54 325i ; 93' carrera 2 Join Date: Apr 2012 Location: palm beach gardens, fl iTrader: (6) Garage List 2008 Corvette z-06 [0.00] 2015 BMW m3 [10.00]	Why on Earth does the A/C turn on every time I start the Car As the title states - my ac is turning on every time I start the car...even if I hit the off button prior to shutting the car down. This, in my opinion, is complete stupidity - and I live in South Florida! I have always powered off the AC before shutting any of my cars down. A cold motor trying to crank and turn a compressor on just doesn't seem wise for longevity - it just forces things to work harder, right? Am I doing something wrong, or I am not getting the point of why BMW did this?
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05-08-2015, 05:24 PM	#2
AIRPOWER Lieutenant Colonel 1683 Rep 1,812 Posts Drives: 2015 6MT YMB M3, 1974 Corvette Join Date: Apr 2015 Location: NW Florida iTrader: (0) Garage List 2015 BMW M3 [9.67]	Just how BMW rolls.....get it coded out. __________________ AIRPOWER
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05-08-2015, 07:39 PM	#5
Andrew115 Major 328 Rep 1,450 Posts Drives: Silver Bullet Join Date: May 2013 Location: Charlotte NC iTrader: (0)	Hated this also all winter till I turned off the ac button. Now I am quite happy with it since is been in the 80s and I don't drive in the morning.
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05-09-2015, 09:16 AM	#6
BaLLzZz Colonel 128 Rep 2,298 Posts Drives: e92 335i Join Date: Aug 2007 Location: NYC iTrader: (5)	Supposable the Kool Aid they are feeding the genius over here is this. The HVAC system cycles on at start up because over the years of non-operating systems there seems to be a stale unpleasant smell that will form in internals of the system. So to counteract that they make it cycle on every time you start the car. I do believe it because it does happen in my e46, that smell they are referring to. I do hate it also and you can get it coded out. __________________ Any intelligent fool can make things bigger, more complex, and more violent. It takes a touch of genius and a lot of courage to move in the opposite direction. - Albert Einstein 01 e46 m54 - Current : 14 f10 n26 - Boring & Gone : 15 f30 n26 - Current : 08 e92 n54 - Gone & Missed!!!
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05-09-2015, 10:07 AM	#7
r33_RGSport General 12972 Rep 18,717 Posts Drives: G09 XM, G05 X5 40, 991.2 T Join Date: Oct 2009 Location: So. Cal iTrader: (6)	Correctly stated by the other members, It is just a coding away. __________________ Email:sales@rgsport.com \| IG:RGSport_USA \| Web:RGSportShop.com PM for Everyday DEALS!! MSS • iSweep • RaceChip • Sterckenn • AutoTecknic • Akrapovic • Vossen Wheels • Eventuri Active Autowerke • KW • H&R • Ohlins • Remus • and more...
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05-09-2015, 12:31 PM	#9
sonicsonic Private First Class 31 Rep 159 Posts Drives: 2014 335i xDrive 6MT 370whp Join Date: Jun 2013 Location: Krasnodar iTrader: (0)	Ihka \| 3002 \| Memory_off \| Aktiv Ihka \| 3002 \| Ac_nicht_ein_bei_auto \| Aktiv
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05-11-2015, 10:18 AM	#12
Ian1973 Colonel 736 Rep 2,134 Posts Drives: 15 M3 Join Date: Sep 2013 Location: Charlton, NY iTrader: (0)	If you have it on auto, then it will need the compressor to keep the cabin at the desired temperature. If it's the winter obviously it won't need it and the compressor wont be on... The summer obviously it will. Personally I would never not use the auto function. Just set the desired temp and let it go
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