A/C Default on Climate Control
Thread Starter
Pole Position
Joined: Oct 2008
Posts: 2,875
Likes: 31
From: wi
A/C Default on Climate Control
I have had the 04 LS premium in the past and did not notice the default to AC on the Climate control when turned on in auto and manual. I recently bought a premium with controls in the nav which defaults to AC.
Is there a real drain on this big ol V8 or the A/C system or mileage where I should be trying to remember to turn off the a/c every time? Thanks
Is there a real drain on this big ol V8 or the A/C system or mileage where I should be trying to remember to turn off the a/c every time? Thanks
Lead Lap
Joined: Feb 2013
Posts: 680
Likes: 0
From: Redmond wa
I have had the 04 LS premium in the past and did not notice the default to AC on the Climate control when turned on in auto and manual. I recently bought a premium with controls in the nav which defaults to AC.
Is there a real drain on this big ol V8 or the A/C system or mileage where I should be trying to remember to turn off the a/c every time? Thanks
Is there a real drain on this big ol V8 or the A/C system or mileage where I should be trying to remember to turn off the a/c every time? Thanks
In certain climate conditions wintertime operation of A/C can prove to be hazardous, sudden fogging of the windshield when it shuts down unexpectedly.
Lexus Test Driver
Joined: Jun 2010
Posts: 823
Likes: 14
From: RU
You NEED auto a/c ON... It's not just make you 'cool', it's there to dry the air as well.
And hvac computer is clever enough, to turn the compressor on just when it's really needed.
Also don't forget, that compressor is automatically disabled if outside temp is below about -8C.
And hvac computer is clever enough, to turn the compressor on just when it's really needed.
Also don't forget, that compressor is automatically disabled if outside temp is below about -8C.
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Lead Lap
Joined: Feb 2013
Posts: 680
Likes: 0
From: Redmond wa
You NEED auto a/c ON... It's not just make you 'cool', it's there to dry the air as well.
And hvac computer is clever enough, to turn the compressor on just when it's really needed.
Also don't forget, that compressor is automatically disabled if outside temp is below about -8C.
And hvac computer is clever enough, to turn the compressor on just when it's really needed.
Also don't forget, that compressor is automatically disabled if outside temp is below about -8C.
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Pole Position
Joined: Jan 2009
Posts: 235
Likes: 10
From: FL
I turn it off manually when not needed. I live in FL so for about 4 months it is an unnecessary hit on my gas milage. I do understand that the compressor is not running all the time, the system cycles it on and off as required but I just turn it off myself if I am comfortable enough. I have tracked every drop of fuel and maintenance since buying the car in January 2009 using an excel spreadsheet and the A/C is a 10% hit. I roll my windows down in the morning, open the sunroof occasionally... There is absolutly nothing wrong with saving money.
Lexus Test Driver
Joined: Jun 2010
Posts: 823
Likes: 14
From: RU
Phew, there's absolutely nothing wrong with living in sunny FL.... Not cold and grim s-hole called Moscow... When it snows - a/c needs to be on constantly to dry the cabin, when it's hot - same deal. Driving with open windows is such a luxury over here.... Pollution and traffic jams are horrid...
Lexus Test Driver
Joined: Jan 2012
Posts: 832
Likes: 8
From: CA
Several experienced A/C techs have told me that it is good to run the compressor every 2 weeks for a few minutes even in the winter to keep the seals from drying out. Of course, this happens automatically if you leave the system in AUTO mode.
Lead Lap
Joined: Feb 2013
Posts: 680
Likes: 0
From: Redmond wa
Urban Legend.
Since about 68 I have always disconnected the A/C compressor clutch wiring during the winter months with no ill effects.
My RX300 has an option which I have used religiously to disable the A/C by simply switching off manuallly once. My 996 C4 has a DIY switch for the same reason.
Lead Lap
Joined: Feb 2013
Posts: 680
Likes: 0
From: Redmond wa
A/C being switched off, or doing so automatically (OAT declines to 34F or below) is more often the cause of windshield fogging...use HEAT to defog/demist the windshield...NO follow-up hazard.
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