Why do 4Runner windows fog up so much?
#1
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Why do 4Runner windows fog up so much?
It hasnt ever bothered me untill today. I got that sort of stumbled thought of, "why the hell does that happen".
Any thoughts, or is it just my 4Runner?
Any thoughts, or is it just my 4Runner?
#3
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I'll double check, thanks. I guess what confuses me is that my wifes new car does not fog under the same circumstances. But now that I think about it, it may be on recycle. mmm.....
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#9
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I started using anti-fog along with cleaning my windows weekly and I haven't had this problem as much. I don't use the anti-fog all the time, but every once in a while is good. While cleaning your windows use this time to clean up the rest of vehicle. I think it's amazing what a clean floor does for the look of a vehicle.
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There is one other thing that can cause your windows to fog up. Any chance that your heater core is starting to leak. I've had a couple of vehicles come into the shop that where complained of windows fogging up. In two cases, it was their heater core that was starting to leak. [One of which was just off warranty. ]
Hope its something simple like a recirculation setting.
Good luck. 1eye
Hope its something simple like a recirculation setting.
Good luck. 1eye
#13
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One other thing is on defrost, the A/C on the Toyota (at least the older ones) does not kick on automatically. You need to hit the A/C button in order for that to happen. What difference does that make? A/C chiils the incoming (fresh or recirc) air, condensing water vapor (you know the stuff that fogs the windows) before it hits the heater core to heat it up. This now drier, hot air is much better at preventing/removing fog on the glass than the cold clammy outside air that is simply warmed up.
#15
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At least in the early 4Runners, everything was sort of manually selectable. The A/C would only operate if you turned it on, no matter what mode the climate control was set to. I had a VW w/ A/C and the A/C would automatically run if you turned on the defrost and no way to turn it off. Same on the power antenna, there was a switch to raise and lower it independently of the radio being on or off. At first I thought that was a PITA, but then when you go off-road and still want to have a tape or CD playing, you can retract the antenna (to save it fron the tree branches) and have the radio on. My '85 has no clutch cancel switch, so I can start in gear all the time, if I want (and I do some times) without fiddling with a switch to do so.
Seems the later models took away a lot of those (lack of) features and replaced them with more automated things. A/C automatically some on w/ defrost, antenna goes up and down with the radio power, etc.
Seems the later models took away a lot of those (lack of) features and replaced them with more automated things. A/C automatically some on w/ defrost, antenna goes up and down with the radio power, etc.
#16
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Well I know where you are coming from, I have had 2 3rd gen Runners, 2 Tacomas and a 93 p/u and all of them fogged up very easy. Keeping the front windows clear is easy, it is the rear hatch windows that fog the worst. When it rains around here I really can't even see out the back side windows, the rear defrost does work ok for the back window. I honestly don't know what it is, but every Toyota truck has had the same issue, and if I have passengers it is much worse. With my 02 Runner I have found if I crack both rear door windows and my driver front, plus tilt the sunroof it really helps a lot. As far as keeping it clean I vac and clean my interior weekly or as soon as I see a spec anywhere on the interior, I'm very weird like that, so my windows stay plenty clean, it is a design issue.
#17
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I've found that newer cars just tend to be better designed as far as the defogging systems go, but cleaning your windows will help a lot.
Last edited by MMA_Alex; 04-25-2007 at 05:57 AM.
#18
i recall there being a trick to keep the bathroom mirror from fogging up by applying some shaving cream on the mirror and then wiping it off (this part takes a lot of effort). something in the cream prevented the fog from occurring. I tried it at home and it lasted for almost a month. Maybe the same principle can be applied to our windows.
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One other thing is on defrost, the A/C on the Toyota (at least the older ones) does not kick on automatically. You need to hit the A/C button in order for that to happen. What difference does that make? A/C chiils the incoming (fresh or recirc) air, condensing water vapor (you know the stuff that fogs the windows) before it hits the heater core to heat it up. This now drier, hot air is much better at preventing/removing fog on the glass than the cold clammy outside air that is simply warmed up.
That's the first thing I thought of. I was suprised to see no one said it sooner. And here I thought that was common knowledge...