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Old 04-04-2018, 11:07 AM   #2
commodorenutt
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Join Date: Jul 2007
Location: Sydney
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Default Re: Windscreen condensation

Every car I've ever owned has done this - because of flow-through ventilation laws, all cars have an "at rest" default which is to leave the demister, or demister & floor open - even just a little, so that when the A/C system is off, some air still flows through the car.

In many cars, it means the demister doesn't fully close, and if you run the A/C on a cool morning where the humidity is near dew point, it causes external condensation to form.

My FG does it all the time, so to previous cars - Commodores, Subarus, and even a Camry I drove the other night in Qld in the rain.
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