Constantly foggy windshield.

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Jul 29, 2008 | 11:06 PM

AAK625

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From: Ft. Lauderdale, FL

Constantly foggy windshield.

Hey guys, I constantly have this "fog" on the inside of my windshield. I don't smoke, so I can't imagine what's causing it. I've tried a ton of different products and cloths.

Any ideas?

Jul 29, 2008 | 11:27 PM

79F1504X4a

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From: Mattawa Northern Ontario

Sounds like a heater core leaking

Moisture, even a tiny bit in the ducts could cause this.

Jul 30, 2008 | 12:27 AM

snoxer

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From: Northern Ontario, Canada

thats what happened when the heater core on my 84 F150 went. was cheap to change. although could be completely different on a newer truck lol

2000 F150 XLT 4x4
1997 F150 XL 4x4
1984 F150 4x4

Jul 30, 2008 | 12:36 AM

1Fordnatic

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From: Anchorage, Alaska

Do you ever smell the slightest amount of antifreeze? A little pinhole in the heater core will really fog the inside. It drives you crazy.

Jul 30, 2008 | 06:03 AM

projectSHO89

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From: St Louis

Quote:

Originally Posted by snoxer

thats what happened when the heater core on my 84 F150 went. was cheap to change. although could be completely different on a newer truck lol

2000 F150 XLT 4x4
1997 F150 XL 4x4
1984 F150 4x4

To say it's different is the understatement of the week.

Steve

Jul 30, 2008 | 06:21 AM

ground_zero298

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Front window seal leak?

Jul 30, 2008 | 08:13 AM

projectSHO89

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Joined: Jan 2004

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From: St Louis

Quote:

Originally Posted by ground_zero298

Front window seal leak?

If the fog is difficult to remove, it's antifreeze.

If it's easy to clean but keeps coming back quickly, check for a clogged evaporator drain.

Steve

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Jul 30, 2008 | 05:38 PM

projectSHO89

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Joined: Jan 2004

Posts: 19,768

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From: St Louis

Quote:

Originally Posted by AAK625

It doesn't seem to be moisture or condensation on the windshield. It's more of a film or smudging. It's only on the windshield, not any of the windows.

See post #7..

Pondering -- Why is that people want to deny the obvious but unpleasant???

Now, if it's appearing over the period of weeks or months, it's just your plastics out-gassing....

Steve

Jul 30, 2008 | 06:45 PM

#10

AAK625

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From: Ft. Lauderdale, FL

I don't want to deny anything Steve. I'm just not experienced enough with vehicles to know where the evaporator drain is. If you could tell me how to check or fix the drain, I'd be more than happy to give it a shot.

We clean the windshield and it's just there the next day. It doesn't get heavier over time. It's just a light haze.

Thanks,
Anthony

Jul 31, 2008 | 03:25 AM

#11

1Fordnatic

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From: Anchorage, Alaska

I would say it's a 90% chance that your heater core is leaking. Nothing else could build up a film that quickly.

Jul 31, 2008 | 09:54 AM

#12

AAK625

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From: Ft. Lauderdale, FL

And how do I check that?

Jul 31, 2008 | 03:11 PM

#13

1Fordnatic

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Posts: 174

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From: Anchorage, Alaska

Unfortunately, it can't really be tested without removing it. You can slightly pressurize it with air and spray it with soapy water and look for the bubbles. But if it's already out, you just as well replace it regardless.