Quote:
Originally Posted by werdbeard
99 malibu windows fog when it gets 30 or below. Good heater and air. Anyone know why this is happening?
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a leaking heater core or a plugged air box drain will do it.
do you add coolant ? if not then check that water drains out the air box.
if that is good then check all carpets/under carpet for wetness. the in trunk check for wetness.
windshields are big , sometimes the rear window will leak.
what you have is a high dewpoint caused by excessive mositure in/getting in the vehicle. when you heat up the interior this wetness start evaporating making the dewpoint to high so the condensation forms on the cold windows.
if you had a few woman breathing heavy that also would do it.