1994 Cadillac Seville Owner's Manual - Page 169

Electronic Climate Control Features A/C Purge If your vehicle is sitting on a hot day and you have it set on AUTO, out the air will first flow out thefloor air ducts for a few seconds. That is normal. This is to expel hot air in the air ducts. As the air is cooled, the flow will move through the A/C outlets. If you start your vehicle with the fan setting on "HI" it will skip the A/C Purge. Cold Weather Purge On cold days when your systemfirst turned on, in either the AUTO or is ECON setting and the fan setting is not on "HI", a small amount of air will flowthrough the defroster duct while the system is waiting the for engine coolant to warm up enough to provide heat. This prevents your breath from fogging your windshield. the coolant warms up,the As blower fan speed will graduallyincrease and air will flow from the heater outlets, with some air bleed thewindshield to prevent fogging under to most normal conditions. Manually Recirculate Inside Air There may be times, when you don't wantair from the outside. To just recirculate the air from the inside only, set the temperatureto 60°F (16°C) and adjust your fan speed, if the air quantity is too high. DEFOG Push this button to divide the air between the windshield and the heater ducts. This is useful when fog appears on the windshield or side glassdue to a sudden rain or snowy conditions. 156