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Open doors glass for while before turning on A/C #4541164
10/12/17 01:01 PM
10/12/17 01:01 PM
Joined: Dec 2016
Posts: 40
Egypt
Omar_Eltahan Offline OP
Omar_Eltahan  Offline OP
Joined: Dec 2016
Posts: 40
Egypt
is it necessary to open doors glass before turning on A/C after parking car in sunlight in hot weather?


2012 Chery A5 1.6L

Engine:Castrol Magnatec 10w40
Transmission:Mobil 80w90
Brake:Castrol DOT4
Power Steering:Unknown
Radiator Coolant:Mobil HOAT 33% EG
Re: Open doors glass for while before turning on A/C [Re: Omar_Eltahan] #4541172
10/12/17 01:11 PM
10/12/17 01:11 PM
Joined: Jun 2002
Posts: 12,521
The Motor City
Kestas Offline
Kestas  Offline
Joined: Jun 2002
Posts: 12,521
The Motor City
Not necessary, but it does help push the hot air out of the cabin more quickly and cool down faster. I do this when the car is parked in the sun.

Re: Open doors glass for while before turning on A/C [Re: Omar_Eltahan] #4541173
10/12/17 01:11 PM
10/12/17 01:11 PM
Joined: Aug 2008
Posts: 3,164
USA
Reddy45 Online shocked
Reddy45  Online Shocked
Joined: Aug 2008
Posts: 3,164
USA
Yes.

Heat always moves from a hot area to a cold area. Opening the windows will help that to occur faster.

Re: Open doors glass for while before turning on A/C [Re: Omar_Eltahan] #4541174
10/12/17 01:11 PM
10/12/17 01:11 PM
Joined: Mar 2014
Posts: 3,268
NJ
Leo99 Offline
Leo99  Offline
Joined: Mar 2014
Posts: 3,268
NJ
How hot is hot? I don't open the windows. What do you mean by "necessary"? It's not necessary. Do you mean advantageous? Maybe a little. I still don't do it.


Without data you're just another person with an opinion. W. E. Deming

2003 Corolla 250,000 miles
2004 Rav4 359,000 miles
2015 Camry 59,000 miles
Re: Open doors glass for while before turning on A/C [Re: Omar_Eltahan] #4541178
10/12/17 01:13 PM
10/12/17 01:13 PM
Joined: Aug 2016
Posts: 502
West Michigan
Balrog006 Offline
Balrog006  Offline
Joined: Aug 2016
Posts: 502
West Michigan
Necessary? No, how or why would it be necessary?

Will it help, probably. The car interior is likely to be hotter than the ambient temp, so allowing the hotter air to escape means the a/c will have to work less to cool the air. Once the air starts to work and the temp outside and inside the car is equalized then close them mostly (to allow the atoll warm air to escape as cooler air is pumped in) or all the way, otherwise your just letting in warmer air while the a/c tries to cool things down.


19 Ridgeline RTL-E >1K factory fill, A01
08 CRV 275K+ VSyn w/ML, A01
04 JD L130 740H, Mobil S 5w30
13 JD 2032r 325H, JD Plus 50 ii 15w40
M1Delvac 5w40 in OPE
Re: Open doors glass for while before turning on A/C [Re: Omar_Eltahan] #4541186
10/12/17 01:19 PM
10/12/17 01:19 PM
Joined: Jan 2008
Posts: 3,972
Guilford, CT
exranger06 Offline
exranger06  Offline
Joined: Jan 2008
Posts: 3,972
Guilford, CT
The way AC works is it simply takes the heat that's inside the car, and it pumps it outside the car. Think of it like pumping water from one place to another. You're simply moving the heat from one place to another. Coldness is the absence of heat, so as more heat gets pumped out of the car, the cooler the inside of the car gets. So if you can let a bunch of heat out by opening the windows, the AC doesn't have as much heat to pump out and the car will cool down quicker.


2006 Ford Ranger Sport
1992 Honda Accord EX
2004 Honda CR-V LX
1994 Ford Bronco XLT (project)
2011 Cadillac Escalade ESV (wife's)
Re: Open doors glass for while before turning on A/C [Re: Omar_Eltahan] #4541187
10/12/17 01:24 PM
10/12/17 01:24 PM
Joined: Feb 2013
Posts: 10,707
Phoenix, AZ
Nick1994 Offline
Nick1994  Offline
Joined: Feb 2013
Posts: 10,707
Phoenix, AZ
It helps a lot in extreme heat


2015 Hyundai Sonata 2.4L 84k Mobil 1 AFE 0w30 & OEM
2000 Toyota Camry 2.2L 230k Valvoline 5w30 & Fram Ultra
1996 Jeep Cherokee 4.0L 147k Mobil 1 HM 10w40 & Fram Ultra
Re: Open doors glass for while before turning on A/C [Re: Omar_Eltahan] #4541197
10/12/17 01:33 PM
10/12/17 01:33 PM
Joined: Jun 2005
Posts: 11,330
Santa Barbara, CA
bdcardinal Online content
bdcardinal  Online Content
Joined: Jun 2005
Posts: 11,330
Santa Barbara, CA
I don't think it is necessary. However out of habit I usually start the car with the driver's door open and keep the windows cracked an inch or 2 at least until I get on the freeway. If anything I get to hear the Borlas better.


2014 Ford Mustang GT Track Pack
1995 Ford Mustang GT

Ford/Mazda Parts Counter
NRA Benefactor Member
Opinions expressed are my own.
Re: Open doors glass for while before turning on A/C [Re: Omar_Eltahan] #4541236
10/12/17 02:01 PM
10/12/17 02:01 PM
Joined: Dec 2016
Posts: 40
Egypt
Omar_Eltahan Offline OP
Omar_Eltahan  Offline OP
Joined: Dec 2016
Posts: 40
Egypt
Well, I'm totally agreed on your opinions, it's my mistake not explaining enough.

First I'm talking about 30-35+ c not f.

Secondly I meant from health prospective, as I've read some topics plus people rumors that not opening windows for a while before turning on a/c causes Heath issues as smell Emission of plastic components inside car interior and Emission of gasoline smell insiside car!! Will affect Health causing Anemia, lower White blood cells, lever and kidney issues. even Leukemia and abortion on long run.

If scientific evidences available it well be great addition.


2012 Chery A5 1.6L

Engine:Castrol Magnatec 10w40
Transmission:Mobil 80w90
Brake:Castrol DOT4
Power Steering:Unknown
Radiator Coolant:Mobil HOAT 33% EG
Re: Open doors glass for while before turning on A/C [Re: Omar_Eltahan] #4541242
10/12/17 02:05 PM
10/12/17 02:05 PM
Joined: Feb 2013
Posts: 10,707
Phoenix, AZ
Nick1994 Offline
Nick1994  Offline
Joined: Feb 2013
Posts: 10,707
Phoenix, AZ
I donít think itíll matter much to your health to be in heat unless you have existing health issues.

35C isnít that hot either.


2015 Hyundai Sonata 2.4L 84k Mobil 1 AFE 0w30 & OEM
2000 Toyota Camry 2.2L 230k Valvoline 5w30 & Fram Ultra
1996 Jeep Cherokee 4.0L 147k Mobil 1 HM 10w40 & Fram Ultra
Re: Open doors glass for while before turning on A/C [Re: Omar_Eltahan] #4541244
10/12/17 02:07 PM
10/12/17 02:07 PM
Joined: Dec 2002
Posts: 42,087
New Jersey
JHZR2 Offline
JHZR2  Offline
Joined: Dec 2002
Posts: 42,087
New Jersey
I just leave the doors open for a bit before even turning the vehicle on, then I run the AC for a bit with the door at least cracked open.

Re: Open doors glass for while before turning on A/C [Re: Omar_Eltahan] #4541246
10/12/17 02:11 PM
10/12/17 02:11 PM
Joined: Dec 2003
Posts: 9,801
Florida, Cape Coral
Eddie Offline
Eddie  Offline
Joined: Dec 2003
Posts: 9,801
Florida, Cape Coral
I run the AC in NON recalculation mode with a window open for about one minute. I close window and set AC to REC and go. Ed


CX5 Touring 2.5L :-)
Re: Open doors glass for while before turning on A/C [Re: Omar_Eltahan] #4541276
10/12/17 03:07 PM
10/12/17 03:07 PM
Joined: Jun 2014
Posts: 2,454
Phoenix, Arizona - USA
SirTanon Offline
SirTanon  Offline
Joined: Jun 2014
Posts: 2,454
Phoenix, Arizona - USA
I live in Phoenix, and during the summer, ambient temperatures regularly go over 115 degrees F (46 deg C), and in the sun with windows closed during these times, it's not uncommon for the interior temperatures in my car to get over 140 degrees F (60 deg C).

During these times, when I get in my car, the first thing I do is open the windows an inch or so, and turn the A/C on full blast in non-recirculate mode. This helps to vent the super-hot air out of the car reasonably fast, and brings it down to at least a 'survivable' level until the A/C can really cool it down.

Once I can feel the A/C putting out decently cold air, I close up the windows and switch it to recirc mode. I've noticed that this process cools it down much faster than just starting with the A/C on recirc and driving off with the windows up the whole time.


2010 Ford Fusion SE - 2.5 liter/6F35 Trans - 262,000mi
2014 Nissan Altima SL - 2.5 liter/CVT - 57,000mi
Re: Open doors glass for while before turning on A/C [Re: Omar_Eltahan] #4541290
10/12/17 03:25 PM
10/12/17 03:25 PM
Joined: Feb 2008
Posts: 4,727
Texas
FZ1 Offline
FZ1  Offline
Joined: Feb 2008
Posts: 4,727
Texas
You need to buy a Heat Shield windshield protector to keep your car cooler in the Sun and your Dashboard protected from the Sun's rays. You can order a perfect custom fit on line about $50. U.S. Hope this helps.

Re: Open doors glass for while before turning on A/C [Re: FZ1] #4541319
10/12/17 03:54 PM
10/12/17 03:54 PM
Joined: Jun 2014
Posts: 2,454
Phoenix, Arizona - USA
SirTanon Offline
SirTanon  Offline
Joined: Jun 2014
Posts: 2,454
Phoenix, Arizona - USA
Originally Posted By: FZ1
You need to buy a Heat Shield windshield protector to keep your car cooler in the Sun and your Dashboard protected from the Sun's rays. You can order a perfect custom fit on line about $50. U.S. Hope this helps.


I've actually already got both - good ones, at that.. Nice fitted velour custom-fit dash cover, and a good, thick, windshield cover.. Doesn't really help all that much in the summer. My car is a dark red, and it soaks up the heat.


2010 Ford Fusion SE - 2.5 liter/6F35 Trans - 262,000mi
2014 Nissan Altima SL - 2.5 liter/CVT - 57,000mi
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