Front Defrost Mode
WARNING: This page is about a different car, the 1999 Cadillac Eldorado and 1999 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
Air flows through defroster outlets with bleed to heater outlets. If outside air temperature is less than 25°F (-4°C), ACM will limit blower velocity until coolant temperature has increased to prevent fogging of windshield. See PURGE MODE . Selecting blower HI setting will override ACM control allowing full blower operation.