climate settings Oldsmobile Achieva 1998 Owner's Manuals

BI-LEV: Use on cool, but sunny days. This setting
brings in the outside air, but directs it in two ways. The
cool air is directed to the upper portion of your body
through the instrument panel outlets, but slightly
warmer air is directed through the heater ducts and
defroster vents. At times this temperature difference
may be more apparent than others.
The air conditioner compressor is enabled in all three
air conditioning positions.
VENT: Use when outside temperatures are mild, and
little heating or cooling is needed. Airflow comes
through the instrument panel outlets. Set the center
control knob to the temperature desired.
HEAT This setting brings heated air through the heater
ducts, and some through the windshield defroster vents.
If you have the optional engine coolant heater (engine
block heater) and use it during cold weather,
0 “F (- 18 O C)
or lower, your heating system will more quickly provide
heat because the engine coolant
is already warmed. See
“Engine Coolant Heater” in the Index.
DEFOG: This setting divides airflow equally between
the heater ducts and the windshield defroster vents.
DEF: This setting directs air through the
windshield defroster vents located
on top of the
instrument panel.
Air Conditioning
The air conditioner and heater work best if you keep
your windows closed while using them. Your vehicle
also has the flow-through ventilation system described
later
in this section.
Your system has three air conditioner settings in
addition to the standard climate control system.
Before using your air conditioner
on very hot days,
open the windows long enough to let hot inside air
escape. This reduces the amount of work your air
conditioner’s compressor will have to do, which
should help fuel economy.
Heating
On cold days, use HEAT 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 ducts.
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
uses to provide heat. See “Engine Coolant
Heater”
in the Index.