Window defrosting remedies?

[BeauBlues]

Hi. Today it rained and rained and rained. The second I get into my car the window is so fogged up I cant see 2 feet ahead of the car. I would wipe it down every chance I get then 2 seconds later back to the fog. Oh yeah i also have the the front and rear defroster on. the rear works ok but i can never seem to get the front to work when I need it. So does anyone out there have any good remedies for defrosting windows in a jiff?

[mike f]

I think all of us have the same problem. Unfortunately I have no solution, but certainly appreciate your frustration. Just keep a microfiber towel around and wipe frequently. Also try not to keep the heat up. Seems to me if you hit a puddle with the heat on and the warm air directed to the windshield it's like an instant fog. The rears don't pose a problem the way the fronts do.

[masraum]

Put cold air on the front window if it's cool outside. If it's cool outside and you add hot air you are just making it worse. Add cool air, then when your car has gotten completely up to temp add the hot air.

[anthony]

Run the A/C if you have it. It works as a dehumidifier.

[Wil Ferch]

Don't know if it works for 911's...but in general...

like Anthony says....dehumidify the car with the A/C.
Important...make sure you have some sort of outside air able to get inside the cockpit. Windows will *not* defog if you're in total "inside-air-recirculation" mode......found this out in *every* other car I've had and driven.

Wil

[Glasgow 911SC]

Originally posted by BeauBlues
Oh yeah i also have the the front and rear defroster on. the rear works ok but i can never seem to get the front to work when I need it.

Whe you say the front defroster, do you mean hot air directed at it or a heated front screen? I have a heated screen that makes life so much easier in the cold weather.

[der Mond]

Wil,
I hate asking these newbie questions, but I assume that means I need to open the cool outside air lever a bit, perhaps short of turning on the outside air fan? Does this mean that when I have my heat levers up pumping heated defrost air, that the air is originating in the cockpit vs. through the air scoop in front of the windshield or back at the heat exchangers, unless I have the external air lever opened? When I do open the outside air, does it just go straight from the intake to the dash, and then simply mix with the heated air? I guess I'm also asking if the heated air is ALWAYS gathered from inside the car, or at the heat exchangers....eventually, I hope to have my PH.D. in the Carrera heat control system.

[nhromyak]

I have always simply turned on the front blower motor (fresh air-fan), and turned the black lever all the way to the right to blow the air up onto the front windshield.

The manual, of course says to turn all three levers all the way to the right, and turnthe heater on high. This works (sometimes) too.

I suspect this will not work in snowy conditions, in these situations you may want to try turning on the AC.

However, I have taken the AC evaporator out (of the smugglers box), and in my car, I have noticed the recirculating "hole" is much smaller than the "fresh-air intake hole" on the AC box. Hence, I doubt this will help.

As such, I have made the fresh-air hole smaller under the AC evaporator. This has mostly helped my AC efficiency in the heat, as it recycles and continually cools the cabin air, than the outside air. YRMV.

Good luck.

[Wil Ferch]

der Mond:
I was trying to keep it as general as possible, by including ALL types of cars.

Where I live, I see many commuters going to work on rainy days with inside condensation. If I ride with these people I ask..." is your lever on "recirc" or is it on "fresh air" ?....The point here is that the last time they used the car, they may have had it on "recirc" to get max cool-down from the A/C and forgot to move the lever over.

In ALL cases...the amount of internal steaming can be greatly reduced if somewhere...there is a mix of inside and outside air being processed. In the 911, if you're unsure of the lever settings...simply "crack" the window...that'll help too.

Wil

[DavidI]

There is a product made made by RainX that does a good job. It is a liquid that you apply to the windows.

David

[nhromyak]

David, has their product improved much over the last couple of years?

I used FOG-x many years ago, and I didn't like the "film" it would leave...

Curious if this has changed over the years.

[Wil Ferch]

If you're on full recirc..you're simply trapping moisture.... these coatings will not work or won't be as effective.....

Wil

[Todd Simpson]

I agree with all levers to the right.

Cracking the windows or sunroof will help once you're moving, the vacuum created will draw a lot of air over the windshield.

Really good AC could be used instead of cracking the windows, but how many 911's have that?