Pontiac 1993 Sunbird Owner's Manual page 92

,
4Air
Conditioning Syskm
(OPTION)
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.
Lever Controls: The upper lever
changes the functions of your system.
The lower lever changes the temperature
of the air coming through the system.
a:
Sets the fan speed. To select the
force of air you want, move the lever.
The fan is always running unless the
upper lever is moved to OFF.
Air Conditioning
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.
The air conditioner compressor operates
in all A/C positions, and in DEF
(Defrost) when the outside temperature
is higher than about 40" F (4.5"
C).
MAX (Maximum): Use for maximum
cooling. This setting recirculates much o f
the air inside your vehicle so it maximizes
your air conditioner's performance and
your vehicle's fuel economy.
NORM (Normal): Use for normal
cooling on hot days. This setting cools
outside air and directs it through the
instrument panel outlets.
B/L (Bi-Level)
:
Use on cool, but s u n q
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.
Ventilation
Slide the upper lever to VENT. Air flow
is through the instrument panel outlets.
Set the lower lever to the temperature
desired.
Heating
Sliding the upper lever to HTR (Heater)
and the lower lever to the right will send
heated air through the heater ducts, and
some through the defroster vents.
The air conditioner compressor doesn't
run in the VENT and HTR 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
A/C
positions, or to DEF (Defrost).
Defrosting
The DEF setting directs most air
through the defroster vents, and some
through the heater ducts.
S I