The primary outputs of human respiration are carbon dioxide and water vapor. If you aren't bringing in outside air, you're just recycling the same moist air, adding more and more moisture with every breath you take. That's why you need to take the air control off the recirculating mode, and set it to bring in outside air.Quotacious wrote:f) The AC/ defrost has to be run like crazy in order to keep the windows clear (~-4 C). I suspect it's my fault for not having the exterior air coming in, though I don't understand what difference that makes.
Ah, I thought that because the AC was on, the car was removing the moisture in the air, including that which we are generating and that introducing air from the outside would only add to the moisture...rwanttaja wrote:The primary outputs of human respiration are carbon dioxide and water vapor. If you aren't bringing in outside air, you're just recycling the same moist air, adding more and more moisture with every breath you take. That's why you need to take the air control off the recirculating mode, and set it to bring in outside air.
Ron, thanks for the explanation. I had the external air vent open last night and it didn't fog up at all. (and yes I do see the symbols now that tell me to do this)rwanttaja wrote:The amount of moisture that air can carry is dependent upon its temperature. The -4 C air from outside won't have much moisture in it, but if the inside temperature is -4 C (when the car is started), every breath you take adds moisture to it until the air becomes saturated. Then the moisture condenses on surfaces such as the inside of the glass. Having the control in the defrost mode at least blows warmer air on the windshield (and thus preventing fogging) but when the warm air stops, the glass cools and lets the moisture-laden air start condensing.
Yes, the Versa certainly is great value; I love it. Just had to ask about those things in case it wasn't standard behavior I'll checkout the hatch later today...tanostoyano wrote:Ok..,
a) There is a light in the hatch it is located upper corner/driver side. If you bulb is burned out it fairly easy to replace.
...still great value...
It wasn't raining when I had the air vents set to recycle, and AC was most definitely on. The windows would not clear in this position. It seems like you absolutely must have the air vents set to bring in outside air, something I still don't understand - shouldn't the air that's inside the car be better, because you have AC running and already have removed the moisture from it? It appears the AC does not remove the moisture in the air from inside the car, just the air coming in from outside.proxim2020 wrote:f) I ran into this problem too. If you want to recycle the air and not have it fog up, you're going to have to run the A/C along with it. If you're bring in fresh air from the outside, you won't have to worry about this. If it's raining and you bring in fresh air, it will cause the windows to fog.
Aha! That fits perfectly. I agree, there is no discernible noise when you switch AC on or off, so it's just not coming on at all. Nice detective work; that service manual sounds like a great thing to have - though I'm pretty sure I'm not going to fork over $210USD for it thoughproxim2020 wrote:But I think I may have an answer. The A/C may not run because of the time of year and the windows are defrosting naturally from the cool dry outside air.
Thanks for the link - I just ordered mine for $9 including shipping. Worth a shot at that price!proxim2020 wrote:I paid $14 a few weeks ago...