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Defrost setting requires fresh air not Recirculate? #397742 Feb 11, 6:34pm Feb 11, 6:34pm
Joined: Jul 2004
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Long Island, NY
bloda01 OP
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2004 Toyota Celica GT
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Defrost setting requires fresh air not Recirculate?
Is there an important reason why the "defrost" setting (air is directed to the windshield) on my 2004 Celica indicate that "fresh air" should be used and not "recirculated" air? As you know, setting it to "defrost" will turn on the A/C.

Is there some compelling engineering reason why the panel indicates "Use with fresh air"?

Ned confused

Re: "Defrost" setting requires fresh air not "Recirc"? [Re: bloda01] #397743 Feb 11, 7:12pm Feb 11, 7:12pm
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g96818
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g96818
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i guess so that it doesnt keep heating the air inside and turning the celi into an oven confused

Re: "Defrost" setting requires fresh air not "Recirc"? [Re: g96818] #397744 Feb 11, 7:28pm Feb 11, 7:28pm
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near Philly, PA
2003 Spectra Mica Blue Toyota Celica
Heat
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The reason you need the fresh air is because it matches the humidity in the car, which is what takes away the 'frost'. smile

And you guys know the little button on the left isn't defrost for the front right? Thats only for your rear window defrost. spineyes


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Re: "Defrost" setting requires fresh air not "Recirc"? [Re: Heat] #397745 Feb 11, 8:22pm Feb 11, 8:22pm
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Chicago, IL
xmangt1
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Right as usual.

Re: "Defrost" setting requires fresh air not "Recirc"? [Re: xmangt1] #397746 Feb 11, 9:08pm Feb 11, 9:08pm
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Dalton GA
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HypnoticJester
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u can use A/C on recirc and fresh air so what is your point


HJ
Re: "Defrost" setting requires fresh air not "Recirc"? [Re: HypnoticJester] #397747 Feb 11, 10:10pm Feb 11, 10:10pm
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hephaestus
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I never used ricirc air since '88 on any car.
I never want to recirculate any "bad" air into my car or me.
Defrost and AC will help with fogging up.
Full defrost and a bit of windshield blue spray will help more with ice.
I never noticed that turning my dial to defrost full (windshield) or half legs/defrost ever activated my AC. I warm up my car everyday and that is pumping full leg and body or half defrost and half leg depending, never did the AC indicator go on, and it was always hot in my car after 10 minutes even with the defrost button push on for the back window.
Maybe I'm missing something here and I think I am.

Re: "Defrost" setting requires fresh air not "Recirc"? [Re: hephaestus] #397748 Feb 12, 4:10am Feb 12, 4:10am
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Long Island, NY
bloda01 OP
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To clarify:

When you set "defrost" (air to inside windshield) in my 2004 Celica GT, you also turn on the A/C--no choice.

My question is---is there a compelling reason to use the "fresh air" setting when using "defrost". It is actually written on the console panel next to the "defrost" knob.

Is reads, "When using defrost, use fresh air". Not in so many words, but in symbolic langauge. My question is Why? Will something bad happen when you use "recirc"? Will moisture build up behind the dash or something?

Ned

Re: "Defrost" setting requires fresh air not "Recirc"? [Re: bloda01] #397749 Feb 12, 4:50am Feb 12, 4:50am
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xmangt1
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Well, I think you need fresh air to flow through the car in order to keep the glass from fogging up. Especially in winter. Cold climates.

Re: "Defrost" setting requires fresh air not "Recirc"? [Re: Heat] #397750 Feb 12, 4:58am Feb 12, 4:58am
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New Orleans, LA
Speed4TheNeed
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Originally Posted by Heat
The reason you need the fresh air is because it matches the humidity in the car, which is what takes away the 'frost'. smile

And you guys know the little button on the left isn't defrost for the front right? Thats only for your rear window defrost. spineyes

Re: "Defrost" setting requires fresh air not "Recirc"? [Re: Speed4TheNeed] #397751 Feb 12, 8:44am Feb 12, 8:44am
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Long Island, NY
bloda01 OP
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So you are saying that fresh air is "drier" than air that is inside the car? And drawing the outside air will remove the fogged windows faster?

Ned

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