A/C doesn't seem to work when driving hard

ATSR · 09-14-2008, 02:02 PM

Hey Everyone,

I've noticed that the A/C in my car doesn't seem to work when I drive my car hard. The fan keeps working but the air coming out of the vents is not as cold as it should be.

It feels just like when you press the button for the A/C to turn it off but keep the fan going.

As soon as I start taking it easy the air gets cold again. Keep in mind that this is happening in Miami, therefore 90 degree temp and 100000% humidity.

Is this happening to anybody else?

Thanks!

quagmire · 09-14-2008, 02:04 PM

Define driven hard. Like redlining it? If so, completely normal. The car will disengage the AC to get full power. Once you continue normal driving, it should reengage.

ATSR · 09-14-2008, 02:09 PM

Quote:

Originally Posted by quagmire

Define driven hard. Like redlining it? If so, completely normal. The car will disengage the AC to get full power. Once you continue normal driving, it should reengage.

Yes. Redlining or at least shifting above 6000 rpms.

quagmire · 09-14-2008, 02:10 PM

Quote:

Originally Posted by alejotrujillo

Yes. Redlining or at least shifting above 6000 rpms.

Normal then. Most cars do this since the AC robs power.

ATSR · 09-14-2008, 03:05 PM

Quote:

Originally Posted by quagmire

Normal then. Most cars do this since the AC robs power.

Thanks for the reply quagmire

Not to take anything away from your response quagmire, but would anybody else like to chime in?

hotrod2448 · 09-14-2008, 03:07 PM

He speaks the truth, at WOT throttle the A/C compressor cuts off to produce max power.

exidisjon · 09-14-2008, 04:10 PM

I noticed this as well and seems to be normal. But after diving REALLY hard and turn on the AC you get HOT air for like 2~4 seconds. And i mean HOT AIR. Like Heater air.

After few seconds it goes away. BMW and Heat is def an issue.

JHFW89225 · 09-14-2008, 04:34 PM

lol maybe im nuts but when i first read the title i was like

because i thought u said ACS cars dunt work properly when being driven..

iheartsole · 09-14-2008, 04:38 PM

take it to the dealer

hotrod2448 · 09-14-2008, 06:43 PM

Quote:

Originally Posted by iheartsole

take it to the dealer

For what? It is doing what it is supposed to.

ACZakka325i · 09-14-2008, 06:47 PM

I heard the M5 does this as well.

Does anyone know the exact parameters?

ATSR · 09-14-2008, 07:46 PM

Thanks for all the info!!!

Everything cool then... unless I drive like a maniac

09-14-2008, 02:02 PM	#1
ATSR Captain 43 Rep 852 Posts Drives: 1977 Honda Civic Join Date: Mar 2008 Location: Wellington, FL iTrader: (0)	A/C doesn't seem to work when driving hard Hey Everyone, I've noticed that the A/C in my car doesn't seem to work when I drive my car hard. The fan keeps working but the air coming out of the vents is not as cold as it should be. It feels just like when you press the button for the A/C to turn it off but keep the fan going. As soon as I start taking it easy the air gets cold again. Keep in mind that this is happening in Miami, therefore 90 degree temp and 100000% humidity. Is this happening to anybody else? Thanks!
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09-14-2008, 02:04 PM	#2
quagmire I am Gundam 186 Rep 1,211 Posts Drives: 2017 Camaro 2SS Join Date: Jun 2007 Location: USA iTrader: (0)	Define driven hard. Like redlining it? If so, completely normal. The car will disengage the AC to get full power. Once you continue normal driving, it should reengage.
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09-14-2008, 03:07 PM	#6
hotrod2448 grand poobah 254 Rep 2,253 Posts Drives: F80 M3, F10 535i Join Date: Dec 2006 Location: Charlotte, NC iTrader: (0) Garage List 2011 335d [0.00]	He speaks the truth, at WOT throttle the A/C compressor cuts off to produce max power.
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09-14-2008, 04:10 PM	#7
exidisjon PuffPuffPass 52 Rep 1,096 Posts Drives: E92 335xi AW/Saddle Join Date: Aug 2008 Location: NJ iTrader: (8)	I noticed this as well and seems to be normal. But after diving REALLY hard and turn on the AC you get HOT air for like 2~4 seconds. And i mean HOT AIR. Like Heater air. After few seconds it goes away. BMW and Heat is def an issue. __________________ My right foot weighs more than my left for sure.
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09-14-2008, 04:34 PM	#8
JHFW89225 Major 176 Rep 1,251 Posts Drives: E92 M3 Join Date: Nov 2006 Location: HK/Vancouver iTrader: (6) Garage List 2009 BMW M3 [0.00] 2008 335i [0.00]	lol maybe im nuts but when i first read the title i was like because i thought u said ACS cars dunt work properly when being driven..
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09-14-2008, 04:38 PM	#9
iheartsole Brigadier General 85 Rep 4,929 Posts Drives: 08 335i coupe Join Date: Apr 2007 Location: San Diego iTrader: (2)	take it to the dealer
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09-14-2008, 06:47 PM	#11
ACZakka325i Colonel 277 Rep 2,008 Posts Drives: 2 stroke Join Date: Jul 2005 Location: CT iTrader: (2)	I heard the M5 does this as well. Does anyone know the exact parameters? __________________ (Waitlist): #1 M2CSL (Current): 2016 F15 X5 3.5xdrive - 2010 997.2 C4S Coupe (Past): 2016 F30 340xi M-Sport -2013 535i xdrive 2008 E92 M3 - 2006 E90 325i 2002 E46 325xi - 1991 E30 325i
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09-14-2008, 07:46 PM	#12
ATSR Captain 43 Rep 852 Posts Drives: 1977 Honda Civic Join Date: Mar 2008 Location: Wellington, FL iTrader: (0)	Thanks for all the info!!! Everything cool then... unless I drive like a maniac
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