New answers tagged hvac
De-Frosting is just that, and its purpose is to de-frost the front screen, usually, on a cold morning. It should be regarded on a safety first basis, seeing where your going. I assume the assumption is made that the driver is dressed for cold weather before getting into the vehicle. In this case the de-frost would be maximised on defrosting the screen.
Yes, the option exists in some models. E.g. in my 2002 Opel Astra, I can enable/disable any of the air channels on climate control independently from others. Usually, there's one ventilation duct going upwards and one going downwards, like here on Suzuki Vitara ('00-'06 model): The flap that controls whether the air from upper duct leads to defrost or ...
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