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Old 11-17-2008, 12:53 PM   #1
bnther36
 
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Windows won't un-fog

I'm just curious to see if anyone else is having window fogging issues. I've never had so much trouble with this on my other cars, but the little Yaris just does NOT want to cooperate.
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Old 11-17-2008, 12:55 PM   #2
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Turn your AC compressor on along with your defroster. The problem is with removing the humidity from the air in your vehicle, which your AC system will do.
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Old 11-17-2008, 01:01 PM   #3
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and have it on recirculate mode, correct?
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Old 11-17-2008, 01:04 PM   #4
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OK - you two need a time-out. Sorry, Chino, but....
1. The AC automatically turns on "when needed" with the defrost aimed at the windscreen. Nothing you can do to stop it - I've tried.
2. Recirculate will not get rid of fog - stick it on "fresh air".
3. Flame on! (probably)
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Old 11-17-2008, 01:06 PM   #5
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I agree with #1 and #2 above.
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Old 11-17-2008, 01:07 PM   #6
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... I'm driving down the road. Its cold out. My windows are fogged up. I crank the defroster on high. Nothing. I hit the A/C button and within about 5 seconds my windshield is clear.

That happens, oh, every day during the winter.
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Old 11-17-2008, 01:25 PM   #7
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Originally Posted by ChinoCharles View Post
... I'm driving down the road. Its cold out. My windows are fogged up. I crank the defroster on high. Nothing. I hit the A/C button and within about 5 seconds my windshield is clear.

That happens, oh, every day during the winter.
Dang! Want to trade? I cannot turn off the AC when defrosting. Says in the handbook that's what it does, IIRC.... Strange.
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Old 11-17-2008, 01:38 PM   #8
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When my windows fog, and I turn it to defrost, the A/C goes on automatically as well. That's how most newer cars are from my experience.
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Old 11-17-2008, 01:42 PM   #9
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Fog-X works pretty good and also using shving cream on the window and wipe it off...don't knock it until you try it
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Old 11-17-2008, 01:42 PM   #10
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Quote:
Originally Posted by ChinoCharles View Post
... I'm driving down the road. Its cold out. My windows are fogged up. I crank the defroster on high. Nothing. I hit the A/C button and within about 5 seconds my windshield is clear.

That happens, oh, every day during the winter.
Get your system checked. When my windows are fog up I put it on defrost and it clears up right away.
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Old 11-17-2008, 02:12 PM   #11
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Turn on the A/C, fan, and defroster. Turn the knob to "defrost" setting. If that doesn't work, then crack the windows a little to let some of the humidity out. Never fails.
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Old 11-17-2008, 02:40 PM   #12
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Well, I stand corrected (although I'm sitting down)
Following is from the '07 Owners Manual, showing that you DO need to push the button. Dunno where I (mis)understood that it was turned on automatically.....
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Old 11-17-2008, 03:17 PM   #13
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I just put it to fresh air and click it on to 4 and all the way to heat and the fog goes away in less than a minute.
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Old 11-17-2008, 03:46 PM   #14
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Well, I stand corrected (although I'm sitting down)
Following is from the '07 Owners Manual, showing that you DO need to push the button. Dunno where I (mis)understood that it was turned on automatically.....
We used to have a thread or two which debated whether or not the A/C compressor came on automatically in the Defrost setting. Topic I think came up during fuel economy discussions. Still don't know if any definitive answer surfaced.

My personal experience is the defrost setting will clear the window in seconds with no need to push the A/C button.
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Old 11-17-2008, 03:54 PM   #15
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Check to see that the body plugs are in place and not allowing more moisture in..... feel your carpets to see if they are wet too.
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Old 11-17-2008, 04:41 PM   #16
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Here's some pics of my windows after 45 minutes of driving with the defroster set to recirculate, medium heat, and #4. I tried switching to regular heat, instead of defroster and within 60 seconds the windshield started fogging up. And it's THICK when it does fog up.
I've never had a car do this before.
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Old 11-17-2008, 04:55 PM   #17
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I commute over a mountain that sees over 300 inches of precipitation per year and I have never used the a/c or defrost setting. When the windows fog all I do is crack the window and in a few seconds the windshield is clear.
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Old 11-17-2008, 05:44 PM   #18
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Quote:
Originally Posted by bnther36 View Post
Here's some pics of my windows after 45 minutes of driving with the defroster set to recirculate, medium heat, and #4. I tried switching to regular heat, instead of defroster and within 60 seconds the windshield started fogging up. And it's THICK when it does fog up.
I've never had a car do this before.
It's the "recirculate" that is killing you there. Been there, done that, noticed the problem - all fixed!
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