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#729299 - October 26th 2017 7:14 am Fogged Windows  
Joined: Jan 2014
Posts: 1
0h2me Offline
stranger
0h2me  Offline
stranger

Joined: Jan 2014
Posts: 1
MA
Hi all,
I took, or should I say I tried to, take my 77 E-250 (460 4 barrel), to work this morning, It was about 54 degrees and raining. A little on the humid side.
She started fine, and off we go. Turned on the defrost, and all that would come out is hot humid air. Had to keep wiping the windshield. Not once in awhile but constantly, non stop.
The blower was not drying the windows, but just coating them with fog, so I finally had to park it
What would cause this to happen? The van had AC at one time, but not now. There is plenty of air flow from the (windshield), vents.

Thanks for any input.

#729306 - October 26th 2017 8:45 am Re: Fogged Windows [Re: 0h2me]  
Joined: Nov 2013
Posts: 759
Wedgy Offline
old hand
Wedgy  Offline
old hand

Joined: Nov 2013
Posts: 759
West Texas
Hey Oh2me,

Welcome to the site!

Just spitballing here, but, heater core leaking? Airbox drain plugged? Water penetration into the airbox or ducts? Maybe the Ford guys have a better idea?

Bummer about the AC, sounds like it would surely help in your climate.

We know the defroster sucks, but will it do burnouts?


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#729310 - October 26th 2017 9:47 am Re: Fogged Windows [Re: 0h2me]  
Joined: Aug 2001
Posts: 11,352
Reed Offline
Maniac
Reed  Offline
Maniac

Joined: Aug 2001
Posts: 11,352
Fircrest, WA
Working AC would definitely help this situation since the C system also functioned as an air dryer and de-humidifier. I have had multiple 75-91 Ford vans and none of them had any window fogging issues even though I live in western Washington where I get plenty of rain and it does get down to the teens in the winter.

You most likely have a failed firewall seal or weatherstrippping seal that is letting in too much moisture. As has been mentioned, a failing heater core can also cause the windshield to fog up. You want to get that looked at because having a heater core failure while you are driving is not fun at all. I had it happen to me in my 89 Ford van earlier this year. Pretty amazing smoke show in the cab.


Windows- they're what make a van worth owning!
#729311 - October 26th 2017 10:11 am Re: Fogged Windows [Re: 0h2me]  
Joined: Jun 2010
Posts: 12,653
frscke1 Offline
frscke1  Offline


Joined: Jun 2010
Posts: 12,653
Van Diego California
Welcome to the site Oh2me ...


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