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I'm experiencing window fogging 10 minutes after start-up and on the road with fan, heat and defrost on.

Same exact problem with my 2008 Jetta.

Mine happens only in the rain or on very humid/damp days.

Front window fogs up about 20-30 minutes after driving... can't see anything out the windshield except for a slit in the center that stays clear.

If you were to see it, its as if the blower motor backflows moisture onto the windows and it happens fast - 20-30 seconds tops.

Its done it 3 times and right now we don't have any idea what it is. Computer codes are fine, and the a/c drain plug is clear.
 

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The problem is, the A/C is on, and it cuts out after about 20-25 minutes of driving, and backflows the moisture onto all the windows.

Happened once with Recirc on and once with Recirc off.

Dealer hasn't been too helpful so far.

I've been driving since 1990, had ten different cars of all makes and models, and this is the first time I've ever encountered a problem like this.
 
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