Ac Taking To Long To Cool Down

[Abaddon]

Normal A/C draws in air from outside (100*) and tries to cool it down to a point where it is comfortable to you. Recirc draws the air from within the car (65*-75* once the normal mode gets it to this temp) and tries to cool it down to a point where it is comfortable to you. Point A (front of car) to point B (inside of car) is not very long of a travel to get that hot air cold. You work your A/C harder leaving it normal mode and it you will never achieve the max coldness that you can get by leaving it in a mode that is always trying to cool the outside temp. It is no different than the A/C in your house. The house A/C is recirculating the inside temp and not the outside air. I don't think any of you would open your windows and front door to keep your house cool once your recirc got your house cool.

actually.. modern furnace & A/C systems draw in outside air.

It's mostly for combustion of the furnace in the winter, but serves to add fresh air into the system during the summer. As well, EVERY commercial/Large building out there draws a high proportion of its air from the outside to keep the air as fresh as possible.

 

[08ms3bm]

lol... well no... I would certainly hope not.. even in recirc there is still SOME outside air being drawn into the system.

But the A/C is easily capable of cooling down hot outside air.. its that initial cooling period where you need recirc... once the car is cooled down.. why not get some fresher air in there?

Blame Canada. . . Cali is just a little bit warmer than ontario I would have to imagine.(hump)(hump)(potkettle

 

[ducky1288]

damn you global warming

 

[MikeHTally]

actually.. modern furnace & A/C systems draw in outside air.

My A/C has only one intake -- inside near the t-stat.

As for the cars, we pretty much use recirculate all the time in the Florida summer. I have noticed the two cars with auto air switch to outside air once they've been moving for a while.

 

[wisniaPl]

i notice that my ac take couple mins and its not cold cold

 

[ragindark]

http://www.prnewswire.com/cgi-bin/stories.pl?ACCT=106&STORY=/www/story/02-21-2008/0004759789&EDATE=

To achieve the quickest interior cool-down:

-- If possible, leave the windows down slightly on hot sunny days. Temperatures in a closed car can exceed 140 degrees. An A/C system works by removing heat, so the cooler the interior is to start with, the easier and faster the A/C will do its job.

-- When you first get in the car, roll all the windows completely down, or even better, open the doors for a short period of time. This helps the hot interior air escape quickly.

-- When you first turn the A/C on, set the controls to "MAX" and/or "REC", and use highest blower speed. This moves the greatest volume of air, re-circulates cooling air for even faster cool-down, and prevents hot outside air from entering. As soon as you are comfortable, switch the system to "NORM" or "OUTSIDE", and select a lower fan speed. The lower the blower speed, the colder the air from the system.

-- Applying window tint can help reduce interior temperatures. The tint does not have to be dark to reflect sunlight---- some tints have a metallic substance within them for this purpose. Always check your local and state regulations; window tinting products may not be legal in some states or municipalities.

 

[oaklandopen]

the reason why AC isn't as good nowadays is the fact that it's R-134a instead of R-12. if any of you had cars that were built on or before 1994 you probably had R-12 and your AC was probably the s***. i remember my old jeep felt like an eskimo was sitting on my face when i turned that AC on

just be glad they have refrigerant now, cuz in europe they're forcing manufacturers to put in new systems that don't use R-134a. so the effectivness of AC is going to dwindle yet again

 

[caspeed]

Ac

I've not noticed an A/C issue but I have noticed that the fresh air coming into the car is very warm after a few minutes of operation. It is noticeably warmer than any other car I've owned.

Before the MS3 I could go most of the year with very limited A/C use. Now I use it most days when I drive more than 20 minutes. If I park in the sun I need A/C to cool down the car instead of just lowering the windows for a moment.

Where is the cabin air intake?

Mike

 

[speed1585]

what I have noticed and what I do.

When it is ballz hot, I will start the car turn AC on blast, roll down all the windows and step out of the car for a second. ( normally when its like 100+ in NorCal) then when I start driving I leave the windows down for a minute or so by this time I can feel the AC starting to cool and I roll the windows up. once it starts cooling, I have no issues unless I roll down the windows or something. I always 100% use recirc, the other option for me is stupid.

I notice that in my 3 if I floor it or get high in the RPMS my AC srats blowing warmer air, but then gets back to normal once the driving settles down...

the advice in regards to cracking your windows is so relevant. it makes a world of differnce combine that with the darkest legal tint you can get and one of those winshield sun visors and it will make it all so much easier. But if you think its not cooling properly I would without a doubt have your AC system checked out at the dealer..

 

[eszoom]

if it's in the recirculating mode and still takes a long time to cool, have the dealer look at it, if still under warranty. always use this mode so you don't suck in s*** from the air, on the road into your system. depending where your condenser is at, s*** can get stuck and even damage it. my old voyager had twigs and a lota dirt on there and to replace it. i bought it used, the previous owner musta use fresh. i always use max air. (hawaii) good to have a auto air guy in the family.
speed is so right...