Pontiac 1997 Grand Am Owner's Manual page 130

Air Conditioning Heating
Turning the right control knob to HEATER and the
center control knob clockwise sends some heated air
through the heater ducts toward your feet, and some
through the defroster vents.
On very hot days, open the windows long enough to let
hot, inside air escape. This reduces the time it takes for
your vehicle to cool down, which should help fuel
economy.
For quick cool-down on very hot days, use MAX with
the temperature knob all the way in the blue area. If the
setting is used for long periods of time, the air in your
vehicle may become too dry.
For normal cooling on hot days, use N C with the
temperature knob in the blue area. The system will bring
in outside air and cool it.
On cool but sunny days, the sun may warm your upper
body, but your lower body may not be warm enough. You
can use BI-LEVEL with the temperature knob in the
middle. The system will bring in outside air and direct it
to your upper body, while sending slightly warmed air to
your lower body. You may notice this temperature
difference more at some times than at others.
VENT and HEATER are economical positions because
the air conditioner compressor doesn't run in these
two settings. This reduces engine load, resulting in
improved fuel economy. If either setting fails to keep
you comfortable, or causes your windows to fog up, turn
the right control knob to one of the air conditioning
positions, or to DEFROST.
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.
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