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-   -   A/C air is not cool when temperatures are high (http://www.bimmerfest.com/forums/showthread.php?t=703651)

jayasanala 06-18-2013 08:03 AM

A/C air is not cool when temperatures are high
 
I have 2012 X3 Xdrive purchased 3 months ago from a non BMW dealer. Lately I noticed that when the temperatures or so high(mid 80s - mid 90s) I feel like I’m not getting enough cool air from my car A/C, is it something common or something wrong with my A/C. and if I need fill the gas for my A/C is it covered under BMW Warranty

rdvt4me 06-18-2013 08:14 AM

Did you make sure the middle dial in between the vents was turned to the blue section and not the red? It makes a huge diffence in the temp of the air coming out the vents.

I had this problem on my 2013 X3 and that made a big difference.

jayasanala 06-18-2013 08:24 AM

yes i did made sure that middle dial was turned to blue, as i said if its in the morning or late in the evening its looks like its fine , but in the middle of the hot day when temperatures are peak high that's when i see this problem.

The X Men 06-18-2013 08:34 AM

Have you try putting the air flow control into recir? Max button on? and Auto start stop off.

jayasanala 06-18-2013 09:55 AM

what do you mean by putting air flow control into recir, sorry i didn't understand that part.

The X Men 06-18-2013 10:33 AM

There is a button to control if you want outside air or recirulated air, or you can set it in auto. When you put it in max, the recir mode will turn on automatically.

jayasanala 06-18-2013 12:28 PM

i know what you are talking about now, but i never touch that button to control the air and i always not set it in auto.

Liverman 06-18-2013 12:29 PM

See page 122 in the manual. Button #8.

Also:
  • Make sure the vent in the dash and the vent in the rear seating area are both turned to "blue".
  • The "Intensity of the Auto Program" (page 123) should be turned to max. This controls the maximum fan speed the Auto program will use. If it is left down low, you do not get enough air circulation. This is different than in the previous gen E83 X3.
In really hot weather, I just hit the MAX AC button which turns intensity to maximum, temp to minimum and recirculates the air inside the car instead of brining in hot outside air.

On hot days when I first get in the car, I crack the roof (press in on the sunroof button) to let the hot air escape.

edbiology 06-18-2013 02:48 PM

Quote:

Originally Posted by Liverman (Post 7659235)
See page 122 in the manual. Button #8.

On hot days when I first get in the car, I crack the roof (press in on the sunroof button) to let the hot air escape.

Why not just open all the windows. I usually use my remote key to open the windows before I get into the car in hot weathers. I don't care about the temperature. But the plastic parts in the car releases benzene, which is a strong cancer causing agent, in hot weather to a concentration thats way above the safety level.

Anfänger 06-18-2013 03:31 PM

Quote:

Originally Posted by edbiology (Post 7659568)
Why not just open all the windows. I usually use my remote key to open the windows before I get into the car in hot weathers. I don't care about the temperature. But the plastic parts in the car releases benzene, which is a strong cancer causing agent, in hot weather to a concentration thats way above the safety level.

It makes sense to err on the side of caution when considering the merits of any reported health risk, but my understanding it that there is no credible evidence for excessive benzene levels in cars. The most directly relevant study (Buters JT et al (2007) Toxicity of parked motor vehicle indoor air. Environ Sci Technol. 41(7):2622-9.) reached this conclusion: "Our investigations indicated no apparent health hazard of parked motor vehicle indoor air."

edbiology 06-18-2013 03:53 PM

Quote:

Originally Posted by Anfänger (Post 7659650)
It makes sense to err on the side of caution when considering the merits of any reported health risk, but my understanding it that there is no credible evidence for excessive benzene levels in cars. The most directly relevant study (Buters JT et al (2007) Toxicity of parked motor vehicle indoor air. Environ Sci Technol. 41(7):2622-9.) reached this conclusion: "Our investigations indicated no apparent health hazard of parked motor vehicle indoor air."

Haha I admit my claim isn't based on any proven or published scientific data. But it's true that benzene is a carcinogen, and plastic under high temperature does release variety of harmful fumes. It is reasonable to assume that these fume would increase concentrate in a parked car in a prolonged time period.

As a scientist myself, I know not every published report can be trusted. For example, tobacco companies have published many papers in the past showing smoking can provide various of positive effect to human health.

Doug in NC 06-18-2013 06:14 PM

I know this isn't very helpful, but the AC on my 2011 X3 will freeze me out. I don't set to max or recirculate the inside air. Perhaps your freeon needs to be checked.

gfeiner 06-19-2013 09:10 AM

A/C air is not cool when temperatures are high
 
Quote:

Originally Posted by edbiology (Post 7659688)
...For example, tobacco companies have published many papers in the past showing smoking can provide various of positive effect to human health.

Yep. Do a google search for "cigarette t-zone"


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poker838 06-19-2013 11:26 AM

I noticed once that the A/C button was not lit, so the compressor was not running. Quite odd considering I've always thought the "Auto" button will put the A/C to on by default and control it as needed.

02420X3 06-19-2013 11:37 AM

The advice that I received from my SA was "Never touch the snowflake. Leave it on all of the time."

The X Men 06-19-2013 12:17 PM

Quote:

Originally Posted by 02420X3 (Post 7661133)
The advice that I received from my SA was "Never touch the snowflake. Leave it on all of the time."

You must get that smelly duct work problem from leaving the AC on all the time.

noka 06-23-2013 10:17 AM

Quote:

Originally Posted by The X Men (Post 7661230)
You must get that smelly duct work problem from leaving the AC on all the time.

That's actually how many think you can prevent it because it keeps air paths dry. Not 100% certain of that though. I always leave mine on auto (all seasons) and it does a good job for me whether cold or hot outside.

The X Men 06-23-2013 03:25 PM

Quote:

Originally Posted by noka (Post 7668221)
That's actually how many think you can prevent it because it keeps air paths dry. Not 100% certain of that though. I always leave mine on auto (all seasons) and it does a good job for me whether cold or hot outside.

You can keep it dry while its running but when you shut it off, the cold air inside the duct condensate and build up moisture due to the warm temp outside of the duct. Moisture will turn into molds and mildew and soon enough, you will have that smelly gym sock smell.

04prox2 07-03-2013 08:55 PM

you should always turn the snow flake button off about a block or two before parking this allows the fan to dry out the evaporator and you don't get that moldy smell, down the road that is hard to remove once it starts growing.

02420X3 07-03-2013 08:58 PM

Quote:

Originally Posted by 04prox2 (Post 7689826)
you should always turn the snow flake button off about a block or two before parking this allows the fan to dry out the evaporator and you don't get that moldy smell, down the road that is hard to remove once it starts growing.

I disagree. Never Touch The Snowflake. It should always be on.

If you have a moldy smell then something is wrong. Hound the hell out of the dealer and BMWNA until it is corrected.

mlmetzger 07-03-2013 09:41 PM

A/C air is not cool when temperatures are high
 
Quote:

Originally Posted by jayasanala (Post 7658580)
I have 2012 X3 Xdrive purchased 3 months ago from a non BMW dealer. Lately I noticed that when the temperatures or so high(mid 80s - mid 90s) I feel like I'm not getting enough cool air from my car A/C, is it something common or something wrong with my A/C. and if I need fill the gas for my A/C is it covered under BMW Warranty

On hot days I've noticed that, even on MAX, I don't get really cold air until its been running for maybe 5+ minutes or so. After that it's nice and cold :-)



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drive by72 07-03-2013 11:07 PM

The air con feeling 'weak' is a sign of a low freon charge. If the capacity is 2 lbs, but the car is only holding 1.85, the compressor will still engage and cycle, the car will still cool, but it will not cool to it's full potential.

If the vehicle has ever had air conditioning repair work, you could very likely have a very small leak via O-ring. These systems run at 2-300psi, so if an O ring is not up to par it can leak relatively easily. Another thing too is that AC lines, even though they are aluminum, are prone to corrosion. On a vehicle this new, that is unlikely though. I would have your dealer do a dye check- where they look for a special dye oil under a black light. Because the freon carries the PAG oil, any leak can be detected using this, as the leaking area will be covered in this special dye (which isn't visible to the naked eye unless in large quantities)

alex md 07-04-2013 06:44 AM

A/C air is not cool when temperatures are high
 
Amazing answer i had similar issue with new X33.5 M and as it was explained to me by repair shop foreman my a/c function impoved after proper adjustment of freon pressure in a system.Alex


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The X Men 07-04-2013 07:04 AM

BMW have always had weak AC systems. Out of all the brand I have owned, BMW has got to be one of the weakest, even the non-luxury brands were superior. If you guys think the X3's AC is weak, the E90 328i was even worst. On a 90+ day, I can drive in the city for hours and the cabin would not be cool. The only way to really get the AC cold was to drive it on the highway.

RhoXS 07-04-2013 08:43 AM

Assuming all the controls are set correctly, insufficient cooling is probably related to one of the following mechanical issues that you will need a qualified A/C mechanic to deal with.

- Low refrigerant. Contrary to what many people think, it is impossible to determine if the A/C is charged properly by measuring only pressures. Additionally, due to the small size of a typical automotive A/C system, the correct amount of charge can only be determined by "weighing it in" and the amount is usually only a pound or two and is required to be correct to within a single ounce. Even an ounce too much or too little can adversely effect performance. For this reason, any A/C mechanic that states he will just add a little gas should be instantly avoided. Only after carefully checking for leaks, to charge a system, shops use a computer controlled cart. The cart first recovers all refrigerant that is in the system, then establishes an almost perfect vacuum, and then very carefully recharges it by exactly weighing in the required amount. If the system then cools properly it was low on gas and now it is necessary to find and fix the leak (frequently a compressor shaft seal). One more thing, a system low on gas will cool to some extent but left running long enough the evaporator will freeze up and air flow will significantly decrease. In fact, a frozen evaporator is an excellent indication of an inadequate refrigerant charge.

-Bad expansion valve. Even with a proper charge, a bad expansion valve will either cause inadequate cooling or cause the evaporator to freeze up (if it is stuck open).

-Loose or damaged compressor belt or bad compressor clutch (not likely).

-Bad/weak compressor. A gauge set will help diagnose this.

In any case, IMO, you need to find a TRUSTED shop that regularly does A/C work and have them check it. A friend or neighbor that tells you they can fix it is something to avoid as they will have no way of properly charging the system. Unless they have a good gauge set AND an accurate temperature probe, to measure something called superheat (and probably subcooling too) there is just no way to determine if it is charged properly without recovering and then weighing in the proper charge from scratch.


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