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Discussion Starter · #1 ·
We just had a very hot day in Florida followed by afternoon thunderstorms. This evening I went out and it was incredibly humid after the rain. I turned on the A/C and my windshield and rear windows started to fog up. I was in the fresh air mode. Should I have been in the recirculated air mode?
 

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No, however you should have done a combination of things to reduce the moisture on both the front and back Windows. Where was the A/C

Blowing. Did you press on the rear defogger? Living in Florida you have to find the best possible way of taking care of this problem and quickly.
 

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It's really simple. I leave my A/C on recirculate ALL the time, I don't introduce smoke or dirty fumes from someone else's car. When your windows start fogging up with the A/C, turn up the temperature on the dial its set to low.
 

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Discussion Starter · #4 ·
The arrow in the little man on the dash was pointed to my face. I had the temperature at a high cool but not on the max ac. If I put it on max ac, it automatically goes into recirculation mode.

I didn't press the rear defogger or the front windshield defogger buttons.
 

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QUOTE (sonatahyd @ May 29 2010, 07:53 PM) index.php?act=findpost&pid=327764
The arrow in the little man on the dash was pointed to my face. I had the temperature at a high cool but not on the max ac. If I put it on max ac, it automatically goes into recirculation mode.

I didn't press the rear defogger or the front windshield defogger buttons.
You've got too, and you need to just look at the Manual when you have a few seconds. Florida can get Deadly in a flash. There is a reason

why you would want Fresh Air. Can't agree with Big B on this one.
 

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QUOTE (Big B @ May 29 2010, 10:52 PM) index.php?act=findpost&pid=327763
I leave my A/C on recirculate ALL the time
That's backwards to avoid fogging. It's okay to temporarily 'recirculate' the system when you have a diesel truck in front, or when the interior is at 140º, but you need fresh air to avoid fogging your windows. Having the system in recirculate is like blowing your breath on a window; it fogs up once the air inside the car is saturated. Hope it makes sense.
 

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Discussion Starter · #7 ·
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That's backwards to avoid fogging. It's okay to temporarily 'recirculate' the system when you have a diesel truck in front, or when the interior is at 140º, but you need fresh air to avoid fogging your windows. Having the system in recirculate is like blowing your breath on a window; it fogs up once the air inside the car is saturated. Hope it makes sense.
But what about during a rain storm or right after a rain when the humidity is 100% and the temperature is basically the dew point? This is when I'm getting my fogging problems and maybe I'm wrong but intuitively the recirculated air in my cabin should be less humid than the outside fresh air and I should use that in this circumstance?
 

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QUOTE (Big B @ May 29 2010, 09:52 PM) index.php?act=findpost&pid=327763
It's really simple. I leave my A/C on recirculate ALL the time, I don't introduce smoke or dirty fumes from someone else's car. When your windows start fogging up with the A/C, turn up the temperature on the dial its set to low.
Agree. I leave mine on Recirc all the time. You never know when a smoky '93 Montecarlo will pass you, or you'll encounter a
dead animal on the road. There are plenty enough small air leaks to keep the cabin air fresh.

If your cabin air is very cool, and it's hot and humid outside, you can get outside window fogging. (set AC to defrost)

If the outside air is cool, and you have a lot of passengers, you can get inside fogging. (Turn the AC on, set it to outside air. Brrrrr!)
 
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