Oldsmobile 1999 Alero - Manual (Page 132)

yellow blue
3-4
Heating
On cold days, use FLOOR and the outside air button
with the temperature knob all the way in the red area.
The system will bring in outside air, heat it and send it to
the floor outlets.
Your vehicle has heat ducts that are directed toward the
rear seat. Keep the area under the front seats clear of
obstructions so that the heated air can reach the rear
seat passengers.
If your vehicle has an engine coolant heater, you can use
it to help your system provide warm air faster when it’s
cold outside (0
_F ( - 18
_C) or lower). An engine coolant
heater warms the coolant your engine and heating
system use to provide heat. See “Engine Coolant
Heater” in the Index.
Defogging and Defrosting Windows
Your system has two settings for clearing the front and
side windows. For each setting, adjust the temperature
control as desired.
To defrost the front window quickly, turn the
temperature control knob all the way in the red area.
Use FRONT DEFROST and adjust the fan to the highest
speed. To warm passengers while keeping the front
window clean, use DEFOG.
If you select RECIRCULATION while in the VENT,
BI
- LEVEL or FLOOR modes, humid air can recirculate
inside the vehicle and allow moisture to form on the
windows. If this happens either press the A/C button
to on or select FRONT DEFROSTER or the
DEFOG modes.
Your vehicle is equipped with side window defogger
vents. The side window defogger vents are located on the
outside of the side instrument panel vents. To defrost the
side windows, turn the temperature control knob all the
way in the red area. Use FLOOR and adjust the fan to the
highest speed. To control fogging of the windows, turn
the temperature control knob all the way in the red area.
Use DEFOG and adjust the fan to the highest speed.
To defog the side windows while using air conditioning,
use BI
- LEVEL and adjust the fan to the highest speed
and press the A/C button so that the indicator light is
glowing. For added airflow to the side windows aim
the side vents toward the windows and close the
center vents.