Honda Odyssey Forum banner

All Fogged Up!

14036 Views 25 Replies 17 Participants Last post by  Rogershall
I guess I should be thankful that this is all I have to bitch about, but whenever it rains, my windshield and side windows fog up worse than on any car I have ever driven. I have to constantly cycle the defogger switch on and off to keep them clear. With the defogger on, the air coming out of the W/S vent is very warm and once the W/S is clear, I turn it off.
On other vehicles, there is a split setting to run a trickle of air over the W/S to keep it clear rather that having to select full defrost.

Am I missing something? Is there a setting to allow both heat and defog?

1 - 1 of 26 Posts
Sylvain said:
Hi, just got my Odyssey 2002 EX last night :)

Why would the A/C start when I switch to 'Defrost' :confused: Normally (ie, in my other cars), when I used Defrost, it's to bring HOT air to the windshield to melt the thin ice/frost on it. Not to freeze it! ;) I read the owner's manual last night (front to cover, yep I'm one of those :D ) and all it says about defrost is was I've read here (ie, turns on the A/C). Am I missing something?

Go breathe on a window or mirror. See the fog? That's condensed moisture from your breath.

That very same moisture coming from the occupants of the car will condense on the inside of the cold windows, which fogs them up--and you can't see through the fog. You need to get rid of the moisture.

A little known fact: the air conditioner in a car isn't meant to give cool air so much as it is to give DRY air. Dry air allows your body's natural cooling mechanism, sweat, to work.

Dry air also gives room for the natural moisture from your breath to evaporate. So, to get rid of the moisture that's condensing on the windows, you need to evaporate it with warm air and that warm air has to be dry. Moist warm air won't evaporate the moisture from the windows. Moist warm air directed at the windows will do nothing but put more condensation onto the inside of the windows, and cause *more* problems seeing through them.

So you need the air conditioner year-round, because your body is 97% water and all that moisture causes problems whether it's summer (you need to get rid of the sweat to feel comfortable) or winter (you need to keep the moisture from your breath from condensing onto the cold windows).

Air that's been through the A/C doesn't have to be cold. Just heat it back up again with the heater by turning the heat up.

Moisture is everywhere about a human being, and enclosed spaces are uncomfortable for that reason. (Ever pull the covers over your head in bed and try to stay that way for any length of time? Uncomfortable, isn't it? If you had air conditioned--dry--air circulating under the covers, you wouldn't be uncomfortable. Even better if that air was first dried and then heated to a comfortable temperature.)
See less See more
1 - 1 of 26 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.