Foggy Windows

[(hemi(al hem1]

Annoying problem with windows which fog up while driving or parked outside, though not in the garage. Seems there are cars which fog up, ice up and stay clear. Whats the magic behind this and how to keep the windows clear<- fix the ROOT of the problem? Thanx for any infos

PS Inside of course

[Bill Cosby]

put your defrost on :confused:

[Thaco]

use the fresh air setting on your heater not the recirculate setting.

[Ben]

good heat, and good fans on your defrost mode.

Good circulation in the vehicle is key.

Some cars I see driving around with little tiny portions of their driver and passenger windows defrosted, and their windshields barly clear = crappy heat, low air movement from the heater.

I see it more common on some cars.

I've personally never dealt with it, all my vehicles seem to have wicked heat (all German cars do it seems).

The cause is different air temperatures on the sides of the glass causing condensation.

[BlueGoblin]

The problem is, of course, excess moisture finding a place to go. Giving it some dry air to jump into is a quick solution. Unless its really cold out, set the fan to high. the vent to defrost and put the air conditioning on for a minute or two. The a/c condensor dries the air out. I know it sounds a bit counter intuitive, but it does work.

[hockeybronx]

Originally posted by Ben
all my vehicles seem to have wicked heat (all German cars do it seems)

Agreed. I used to drive a Bronco II and I would have a hell of a time trying to keep the windows clear. My Jetta is much better for that.

Like others have said in this thread, there are many variables associated with where the moisture could be coming from, my advice would be just to start trial and error'ing it until you find somewhat of a solution. Keep in mind with some vehicles you may never be completely satisfied.

[cobra347]

A leaky heater core can cause it also.

[alloroc]

Oh jeez.

Stop readin porno's at red lights YO!


Umm beyond that,

If you use use fresh not recirc - fog

Clean the snow off your car ... before you drive, otherwise said snow will fly into the heater intake plenum melt on the heater coil evaporate and - fog

Your AC can be on at any time in most cars in defrost mode (depending on the ambient , outside air temp, and the refrigerant suction pressure ), but if it is on and then if you switch to heat the moisture that has condensed on the evaporator coil can evaporate in the discharge air - fog.
(to defog in some cars you can manually turn on the AC the evaporator will remove some of the latent heat (water from the air) and if you then turn up the heat a touch you will be dehumidifying the air ... no fog.

Make sure you stomp off your feet before you get in if it is snowy or when the snow melts and the water on the floormats evaporates - fog

If you're parked in an underground garage the humidity in the garage can be quite high .. and the air inside your car. When you exit the garage roll down the window for a 10-30 seconds to bring in some dry air from outside. Otherwise when the windows cool the moisture inside condenses on the windows and - fog


Originally posted by (hemi(al hem1
Annoying problem with windows which fog up while driving or parked outside, though not in the garage. Seems there are cars which fog up, ice up and stay clear. Whats the magic behind this and how to keep the windows clear&lt;- fix the ROOT of the problem? Thanx for any infos

PS Inside of course

[BlueGoblin]

Oops - thanks for correcting me on the A/C Evaporator/ Condensor thing. My bad.

[Ben]

Originally posted by BlueGoblin
The problem is, of course, excess moisture finding a place to go. Giving it some dry air to jump into is a quick solution. Unless its really cold out, set the fan to high. the vent to defrost and put the air conditioning on for a minute or two. The a/c condensor dries the air out. I know it sounds a bit counter intuitive, but it does work.

This does work, Unfortunatly my car does not allow me to use A/C when the temperature outside is below 3 degrees C, to prevent lines fron icing up. I'm sure there are other cars with this feature also, mind you my car doesn't have a defrost issue either.

Might not be an option to do this is what I'm saying...that and you have to have A/C to begin with. haha.

[alloroc]

Originally posted by BlueGoblin
Oops - thanks for correcting me on the A/C Evaporator/ Condensor thing. My bad.

no worries

[R!zz0]

I have the same problem. Everytime i am with a girl in my car the windows fogg up on me. :confused:

[EG_Civic]

use fresh air.. instead of recirculating:confused:

[Bonka]

Make sure you have your vent settings to floor and front windshield. My cars seem to fog up instantly when I leave it on panel vents only.