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Old Nov 24, 2014 | 03:38 PM
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Default Foggy windows

Just got caught in the first snow south of Chicago. Drove in the rain to the health club and while we were in there the temp dropped about 10 degrees and it snowed. It is an '02 yellow vert and first time we've been in the snow with it.
We noticed quite a bit of moisture on the inside of the windows. As the car heated up, it still took a while for the moisture to disappear even with the defroster on high.

Has anyone else experienced this and or is it just normal for this vert?

Thanks,

RWP
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Old Nov 24, 2014 | 03:45 PM
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No experience with this in my 2000 coupe but have never driven in the conditions you describe. I have seen this in another car which turned out to having the Recirc in the on condition. Make sure Recirc is off.
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Old Nov 24, 2014 | 03:53 PM
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Originally Posted by dgree03
No experience with this in my 2000 coupe but have never driven in the conditions you describe. I have seen this in another car which turned out to having the Recirc in the on condition. Make sure Recirc is off.
I'll give it a try. We're just trying to enjoy the car as long as possible before storing it. In the past drove my '67 and '70 all winter long without a problem.

Thanks
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Old Nov 24, 2014 | 04:15 PM
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The carpet isn't wet any place, is it?
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Old Nov 24, 2014 | 04:56 PM
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If the AC is working with the defroster on, the recirc should remove the moisture from the inside cabin air. Aren't you drawing in humidified air that you have to clear if it is snowing outside, even if it is cold? Your AC might not be working, or, turn the heat down a little and see if it clears the window better. Most of the fog inside comes from moisture inside the car condensing on the cold glass of the windshield. There are also anti-fog coatings you can spray on the glass if this is a problem in your area.
And keep a microfiber towel inside the car to wipe it off it's it really wet and not just a little foggy. Then the defroster doesn't have to try to evaporate all that water.
This happens in a lot of cars where it takes a while to clear the windshield and it's not limited to or a peculiarity of the Corvette.

Last edited by mrlmd; Nov 24, 2014 at 05:02 PM.
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Old Nov 24, 2014 | 05:04 PM
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Maybe the heater core?
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Old Nov 24, 2014 | 07:20 PM
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mine did the same thing 04 vert, in the morning when it is cold out it takes a while to get where it will keep the windshield clean and not fogged up. It just does not seem to be as effective as the other cars I drive. all other times it seems fine and works correctly, maybe they just don't like cold temps.
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Old Nov 24, 2014 | 08:05 PM
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Originally Posted by JR-01
The carpet isn't wet any place, is it?
No, not at all! Good thought!

Thanks
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Old Nov 24, 2014 | 08:09 PM
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Originally Posted by fwrogg
mine did the same thing 04 vert, in the morning when it is cold out it takes a while to get where it will keep the windshield clean and not fogged up. It just does not seem to be as effective as the other cars I drive. all other times it seems fine and works correctly, maybe they just don't like cold temps.
Everything seems to be working fine! Drove it this evening 28' and blowing like heck and it was ok. Garage is not heated, but insulated. Temperature probably evened out.

Good thoughts from everyone! I'll use all the suggestions while keeping an I on it.

Thanks Again to all,

RWP
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Old Nov 24, 2014 | 10:53 PM
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NORMAL!!


The A/C stops working automatically at about 34°F. It is a poor design. Just when you need the A/C to help defog....it turns off, and the windows fog up.

Notice, in cold weather when you try to turn the A/C on, the light just blinks.
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Old Nov 25, 2014 | 02:10 AM
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It takes my vert about 8 to 10 minutes to warm up from dead cold overnight enough to clear and keep the windshield clear of fog on the inside. I can never wait that long, so I keep a cloth in the back to dry the inside, and just use the wipers for the outside. Even then, it can fog back up when driving so I keep the cloth close.
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Old Nov 25, 2014 | 08:02 AM
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Originally Posted by ztheusa
NORMAL!!


The A/C stops working automatically at about 34°F. It is a poor design. Just when you need the A/C to help defog....it turns off, and the windows fog up.

Notice, in cold weather when you try to turn the A/C on, the light just blinks.
Now that you mention it you are right! I have experienced that. Thanks for the info. Usually it is never out in low temperatures.

I appreciate the info.

Thanks,
RWP
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Old Nov 25, 2014 | 08:06 AM
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Originally Posted by Voodoo13
It takes my vert about 8 to 10 minutes to warm up from dead cold overnight enough to clear and keep the windshield clear of fog on the inside. I can never wait that long, so I keep a cloth in the back to dry the inside, and just use the wipers for the outside. Even then, it can fog back up when driving so I keep the cloth close.
Great tip. I'll put a cloth in there this morning. Going to stretch the driving season two more days. Have flown over your area many times into and out of the country.

Thanks,

RWP
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Old Nov 25, 2014 | 09:36 AM
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Originally Posted by ztheusa
NORMAL!!


The A/C stops working automatically at about 34°F. It is a poor design. Just when you need the A/C to help defog....it turns off, and the windows fog up.

Notice, in cold weather when you try to turn the A/C on, the light just blinks.
^ Correct. Pretty frustrating when it happens too
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Old Nov 25, 2014 | 12:42 PM
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Originally Posted by ztheusa
NORMAL!!


The A/C stops working automatically at about 34°F. It is a poor design. Just when you need the A/C to help defog....it turns off, and the windows fog up.

Notice, in cold weather when you try to turn the A/C on, the light just blinks.
Right!

Started the car this morning in the garage, about 44' and the air indicated "on". Started driving and as soon as the indicated temperature dropped to 33' the AC light blinked and then extinguished. Normal ops from that point forward and no steamed up windows. Guess I should read the owners manual!

Thanks,

Bob
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Old Nov 25, 2014 | 11:42 PM
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I don't think I've owned a vette that didn't fog up inside. I got the following info from my Allstate guy last year.

"The reason for foggy windows has to do with temperature and the air’s moisture content. On a cold day, any moisture in the air inside your car — from passengers exhaling, from snow on your boots, etc. — turns to condensation when it hits air next to the window when the temp outside is colder."

Something to do with dewpoint. These remedies are on their website.

"For a quick fix: Lower the temperature inside your car rapidly by turning on the defrost vent with cool air or cracking a window; don’t turn on the heat. This will make the inside of your car cooler and help reduce the fog. Also, turn on your car’s rear-window defogger to help clear up the back window. Though this is a fast and effective method, it could leave you shivering."

Here is an old Okie trick I learned from the farm owner where I worked in high school. It surprisingly works, if you can bring yourself to using it on a Corvette.

1. Use a clean potato, one that has had the soil washed off. A potato that is growing eyes is okay.
2. Cut it in half.
3. Rub the open part of the 'tater on your windshield.
4. This not only cleans the windshield but it prevents the build up of moisture on the glass.

If you can't do the potato trick, buy one of the many products available that help stop the build up.
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Old Nov 26, 2014 | 12:24 AM
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Originally Posted by Rwp315
Great tip. I'll put a cloth in there this morning. Going to stretch the driving season two more days. Have flown over your area many times into and out of the country.

Thanks,

RWP
Driving season here is all year round. Winters here have a fair amount of "moisture" so I have been dealing with fogged up and iced up windows for 40 years. Just turn up the heat and fan on hi.

I fly through ORD several times a year, Next time you fly over YVR wave! You'll see my car parked 3 miles due south of runway 26L in my driveway.

Doug
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Old Nov 26, 2014 | 06:35 AM
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Two fold issue had happen to you Dude -

1) A 20 degree temp drop on the day you were out

2) Funky " mind of its own " design of the climate control

Just push some bottons, turn some dials, that fog disapates after awhile
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Old Nov 27, 2014 | 01:43 PM
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Originally Posted by Voodoo13
Driving season here is all year round. Winters here have a fair amount of "moisture" so I have been dealing with fogged up and iced up windows for 40 years. Just turn up the heat and fan on hi.

I fly through ORD several times a year, Next time you fly over YVR wave! You'll see my car parked 3 miles due south of runway 26L in my driveway.

Doug
Cool!

I retired from Boeing last year, so I don't get that way anymore. May start up as a contract pilot in May.

Thanks,

Bob
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Old Nov 27, 2014 | 01:44 PM
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Originally Posted by 03 A/E Coupe
Two fold issue had happen to you Dude -

1) A 20 degree temp drop on the day you were out

2) Funky " mind of its own " design of the climate control

Just push some bottons, turn some dials, that fog disapates after awhile
You are right!

Thanks!
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