AC delay

Maxdog · 08-12-2020, 07:00 AM

The AC in my M340i takes about a minute and a half to get cold after start up. It just blows hot air until then regardless if it is set to MAX or AUTO.

Is that normal? I don't remember it taking that long on other cars I've had.

Voodoo_G80 · 08-12-2020, 07:24 AM

Same!

Maxdog · 08-12-2020, 07:57 AM

Quote:

Originally Posted by Orange_m340i

Same!

Do you think it's normal?

bimmer456 · 08-12-2020, 08:16 AM

I have a g20 loaner it does seem to take awhile to get cool compared to my f30 and the vents seem smaller and not in the best location.

HighlandPete · 08-12-2020, 08:30 AM

Quote:

Originally Posted by Maxdog

Do you think it's normal?

If I read you correctly, you say it is faster in Auto and using MAX. If it is only when you select semi auto functions that is likely the reason.

Based on years of BMW HVAC designs, 'Auto' is designed to reach the selected temperature as fast as is comfortably possible. Semi auto, (off Auto), may mean more feedback is required to get the system up to speed.

Edit... I reread your first post and see you mention using Auto and MAX, does appear slow to get going.

Maxdog · 08-12-2020, 09:02 AM

Quote:

Originally Posted by HighlandPete

Quote:

Originally Posted by Maxdog

Do you think it's normal?

If I read you correctly, you say it is faster in Auto and using MAX. If it is only when you select semi auto functions that is likely the reason.

Based on years of BMW HVAC designs, 'Auto' is designed to reach the selected temperature as fast as is comfortably possible. Semi auto, (off Auto), may mean more feedback is required to get the system up to speed.

Edit... I reread your first post and see you mention using Auto and MAX, does appear slow to get going.

No it blows warm air when first starting the car in any ac mode then blows ac cold air after about 90 seconds

golferboy2312 · 08-12-2020, 09:14 AM

Mine gets cold pretty fast, but I wish it had a higher fan speed.

mcjohnsonsg · 08-12-2020, 09:26 AM

I would say mine is blowing cold air after about 30seconds...certainly not as long as 90 secs.

FrostNixon · 08-12-2020, 10:15 AM

That's normal I'd say because it depends on the outside temperature. Here currently it's 38C or 100F and it takes about as much time for cold air to start blowing, because the compressor has more work to do due to the heat, however when I was in the mountain on the weekend where it was 25C or 77F it took less than 15 seconds I'd say for cold air to start coming out.

del82 · 08-12-2020, 11:58 AM

Not experienced anything like a long delay.

There is a setting in the AC menu that changes the level of cooling.

JasonDot · 08-12-2020, 01:21 PM

Good observation. I haven't used the AC many times but I do recall it taking longer than most cars.

HighlandPete · 08-12-2020, 01:36 PM

Quote:

Originally Posted by FrostNixon

That's normal I'd say because it depends on the outside temperature. Here currently it's 38C or 100F and it takes about as much time for cold air to start blowing, because the compressor has more work to do due to the heat, however when I was in the mountain on the weekend where it was 25C or 77F it took less than 15 seconds I'd say for cold air to start coming out.

Good points.

I'm wondering if it is simply a case of heat soak and possibly the intensity setting for air flows.

Modern HVAC systems are deeply embedded into the car structure, can take a while to get the heat away, in high ambient temperatures.

TheRetroGuy · 08-12-2020, 02:12 PM

The climate control system has impressed me so far in this car. Most cars I've had have been good enough, this one seems to take it up a notch.

However, it's also the first car I've had with remote start, so in some cases (not all) the pre conditioning might be increasing my opinion of it.

Weiner0123 · 08-13-2020, 03:01 AM

Mine kicks in around 15-20 seconds

Gdiddy23 · 08-13-2020, 09:56 AM

Mine takes no longer than 20 seconds too

NYC_340i · 08-13-2020, 10:20 AM

Mine takes about 30 seconds to a minute on a hot day to start blowing cold, but isn't that normal? Shouldn't it take any car around that same time to get the A/C going?

One thing that is really annoying is that I find myself constantly having to hit the menu button to go into iDrive to turn on the A/C. For some reason when I put the climate control to auto it doesn't turn on the A/C. Not sure if I am just doing something wrong.

themnmd · 08-13-2020, 11:07 AM

I have found no issues, though the hotter it is out the longer it takes. But that is only 30 seconds or so.

del82 · 08-13-2020, 01:56 PM

Quote:

Originally Posted by NYC_340i

Mine takes about 30 seconds to a minute on a hot day to start blowing cold, but isn't that normal? Shouldn't it take any car around that same time to get the A/C going?

One thing that is really annoying is that I find myself constantly having to hit the menu button to go into iDrive to turn on the A/C. For some reason when I put the climate control to auto it doesn't turn on the A/C. Not sure if I am just doing something wrong.

That's weird. On mine AC is always on and stays on.

Press auto. But also check iDrive

Car - settings - climate comfort - heating/ventilation - driver - automatic

JasonDot · 08-16-2020, 09:47 AM

Quote:

Originally Posted by JasonDot

Good observation. I haven't used the AC many times but I do recall it taking longer than most cars.

CORRECTION: Yesterday I put more thought into it... It takes about 20 seconds for cold air to flow. This was observed from a cold start from my cool garage and a warm start in a 84 degree sunny parking lot.

stevej2002 · 08-16-2020, 05:41 PM

Today I had to run some errands. Here in Central California the temp on the dash varied between 109 and 111F (That's about 45C for you non-US folks). Just about instant cold -- within a few seconds -- and excellent control of the internal temp. I should mention there's no humidity here.

bmwboost1 · 08-21-2020, 05:39 PM

I had this concern too but experienced it in a new 540i, x3, x5 and other g20 loaners. The dealer said its normal so I'm assuming its just pumping out the hot air left in the duct. MAX gets rid of it almost instantly, but when I hit any other option it does take a bit.

08-12-2020, 07:00 AM	#1
Maxdog Second Lieutenant 49 Rep 272 Posts Drives: 2014 335i xdriive msport Join Date: Aug 2014 Location: Ontario Canada iTrader: (0)	AC delay The AC in my M340i takes about a minute and a half to get cold after start up. It just blows hot air until then regardless if it is set to MAX or AUTO. Is that normal? I don't remember it taking that long on other cars I've had.
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08-12-2020, 07:24 AM	#2
Voodoo_G80 Private First Class 97 Rep 167 Posts Drives: G Join Date: Nov 2019 Location: United States iTrader: (0)	Same!
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08-12-2020, 08:16 AM	#4
bimmer456 Major General 2950 Rep 5,984 Posts Drives: 340i Join Date: Nov 2016 Location: Pasadena, CA iTrader: (0)	I have a g20 loaner it does seem to take awhile to get cool compared to my f30 and the vents seem smaller and not in the best location.
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08-12-2020, 09:14 AM	#7
golferboy2312 Private First Class 79 Rep 101 Posts Drives: 2020 M340i xDrive Join Date: Apr 2009 Location: Austin, Texas iTrader: (0)	Mine gets cold pretty fast, but I wish it had a higher fan speed.
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08-12-2020, 09:26 AM	#8
mcjohnsonsg First Lieutenant 386 Rep 315 Posts Drives: M340 xdrive Join Date: Apr 2019 Location: New York City iTrader: (0)	I would say mine is blowing cold air after about 30seconds...certainly not as long as 90 secs.
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08-12-2020, 10:15 AM	#9
FrostNixon First Lieutenant 101 Rep 309 Posts Drives: vw golf Join Date: Jun 2020 Location: Bulgaria iTrader: (0)	That's normal I'd say because it depends on the outside temperature. Here currently it's 38C or 100F and it takes about as much time for cold air to start blowing, because the compressor has more work to do due to the heat, however when I was in the mountain on the weekend where it was 25C or 77F it took less than 15 seconds I'd say for cold air to start coming out.
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08-12-2020, 11:58 AM	#10
del82 Second Lieutenant 102 Rep 250 Posts Drives: BMW M340i xdrive Join Date: Dec 2019 Location: UK iTrader: (0)	Not experienced anything like a long delay. There is a setting in the AC menu that changes the level of cooling. __________________ Current: 2020 M340i Past: M140i, Z4 35is
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08-12-2020, 01:21 PM	#11
JasonDot Second Lieutenant 580 Rep 285 Posts Drives: M4, X3 and 330e Join Date: Jul 2020 Location: San Diego iTrader: (0)	Good observation. I haven't used the AC many times but I do recall it taking longer than most cars. __________________ Digital license plates are better...
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08-12-2020, 02:12 PM	#13
TheRetroGuy Second Lieutenant 148 Rep 265 Posts Drives: 2020 330i xDrive mSport Join Date: Jan 2020 Location: East Coast iTrader: (0)	The climate control system has impressed me so far in this car. Most cars I've had have been good enough, this one seems to take it up a notch. However, it's also the first car I've had with remote start, so in some cases (not all) the pre conditioning might be increasing my opinion of it.
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08-13-2020, 03:01 AM	#14
Weiner0123 First Lieutenant 417 Rep 381 Posts Drives: 2020 m340i. 2013 328i Join Date: Mar 2019 Location: Calgary iTrader: (0)	Mine kicks in around 15-20 seconds
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08-13-2020, 09:56 AM	#15
Gdiddy23 Major 907 Rep 1,168 Posts Drives: 2020 M340i Join Date: Dec 2018 Location: St. Paul, MN iTrader: (1) Garage List 2015 BMW F30 [0.00]	Mine takes no longer than 20 seconds too __________________ 2020 M340xi PB (sold) 2020 Ram 1500 Laramie (Daily) 2019 Shelby GT350R (Weekend)
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08-13-2020, 10:20 AM	#16
NYC_340i Lieutenant 207 Rep 547 Posts Drives: '20 M340i xDrive, '11 X3 28i Join Date: Jun 2011 Location: NYC iTrader: (0)	Mine takes about 30 seconds to a minute on a hot day to start blowing cold, but isn't that normal? Shouldn't it take any car around that same time to get the A/C going? One thing that is really annoying is that I find myself constantly having to hit the menu button to go into iDrive to turn on the A/C. For some reason when I put the climate control to auto it doesn't turn on the A/C. Not sure if I am just doing something wrong. __________________ Current: 2020 M340xi Previous: 2016 340xi
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08-13-2020, 11:07 AM	#17
themnmd Colonel 1691 Rep 2,699 Posts Drives: 23 X5MC Join Date: Sep 2018 Location: San Rafael CA iTrader: (0) Garage List 2020 BMW M340i X [0.00]	I have found no issues, though the hotter it is out the longer it takes. But that is only 30 seconds or so.
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08-16-2020, 05:41 PM	#20
stevej2002 New Member 3 Rep 16 Posts Drives: G20 330i Join Date: Oct 2019 Location: Central California iTrader: (0)	Today I had to run some errands. Here in Central California the temp on the dash varied between 109 and 111F (That's about 45C for you non-US folks). Just about instant cold -- within a few seconds -- and excellent control of the internal temp. I should mention there's no humidity here.
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08-21-2020, 05:39 PM	#21
bmwboost1 Enlisted Member 28 Rep 34 Posts Drives: 2020 M340i, 2019 330i, 2017 54 Join Date: Aug 2019 Location: Orlando, FL iTrader: (1)	I had this concern too but experienced it in a new 540i, x3, x5 and other g20 loaners. The dealer said its normal so I'm assuming its just pumping out the hot air left in the duct. MAX gets rid of it almost instantly, but when I hit any other option it does take a bit.
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