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Buick CENTURY 1996 Manual page 120

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When outside temperatures are cold, sliding the upper
lever to HEATER and the lower lever to HOT will
send heated air through the heater ducts, and some
through the defroster vents. VENT and
HEATER
are labeled ECONOMY 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,
slide the upper lever to one of the air conditioning
positions, or to DEF (defrost).
The upper lever has three air conditioner settings. 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.
MAX:
Provides maximum cooling with the least
amount of work. This setting recirculates much of the
air inside your vehicle so it maximizes your air
conditioner's performance and fuel economy.
NORM: Use for normal cooling on hot days. This
setting cools outside air and directs it through the
instrument panel outlets.
BI-LEV:
Use this on cool, but sunny days. This setting
brings in the outside air, and directs it in two ways. The
cool air is directed to the upper portion of your body
through the instrument panel outlets, and warmed 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 operates in all air
conditioning positions, and in DEF (defrdst) when the
outside temperature is above about 40°F (4.5"C).
r
gii
The DEF setting directs most of the air through the
defroster vents and some through the heater dl s.
To quickly defog the windshield, set the upper le
~
r
to
DEF and move the fan switch to HI. Slide the lower
lever to HOT.
In damp, cool weather (temperatures about 45"to 65"F,
7
"
to 18
"
C ) , you can use BI-LEV to defog the side
windows. Set the upper lever to BI-LEV and the fan
switch to HI. Aim the side vents toward the side
windows, For increased airflow to the side vents, close
the center vents.
3-2

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