Circulation Control
Use this control to choose be-
tween outside air intake or
recirculation of the air inside
the vehicle. Only use the re-
circulate mode to temporarily
block out any outside odors,
smoke, or dust and to cool the
interior rapidly upon initial
start up in very hot or humid
weather.
This control only operates in the Outside Air and Recir-
culate modes; there is no in between position. Do not
place the control between these positions.
NOTE:Continuous use of the recirculate mode may
make the inside air stuffy and window fogging may
occur. Extended use of this mode is not recommended.
In cold weather, the use of the Recirculate position will
cause windows to fog on the inside because of moisture
build up inside the vehicle. For maximum defogging,
select the Outside Air position.
If the mode control is in the range between Mix and
Defrost and you choose the Recirculate mode, the mode
control knob will automatically move to the Mix position.
NOTE:If you choose either the Mix or Defrost modes
and the Circulation control is in the Recirculate Mode, the
system will automatically switch to the Outside Air
position.
UNDERSTANDING YOUR INSTRUMENT PANEL 87
4
Window Fogging
Vehicle side windows tend to fog on the inside in mild
rainy or humid weather. To clear the windows, use the
A/C, PANEL and blower controls. Direct the panel
outlets toward the side windows. Do not use recirculate
without A/C for long periods as fogging may occur.
Interior fogging on the windshield can be quickly re-
moved by using the defrost position.
If the fogging problem persists, clean the inside window
surfaces. The cause of undue fogging may be dirt collect-
ing on the inside surface of the glass
NOTE:In cold weather, the use of the recirculate
position will cause windows to fog on the inside because
of moisture build up inside the vehicle. For maximum
defogging, use the Outside Air position.
Summer Operation
Air conditioned vehicles must be protected with a high-
quality antifreeze coolant to provide proper corrosion
protection and to raise the boiling point of the coolant for
protection against overheating. A 50% concentration is
recommended.
Outside Air Intake
When operating the system during the winter months,
make sure the air intake, directly in front of the wind-
shield, is free of ice, slush, snow or other obstructions
such as leaves. Leaves collected in the air-intake plenum
may reduce air flow and plug the plenum water drains.
The blower air will heat faster in cold weather if you use
only a low blower speed for the first few minutes of
vehicle operation.
Side Window Demisters
A side window demister outlet is at each end of the
instrument panel. These nonadjustable outlets direct air
toward the side windows when the system is in either the
FLOOR, MIX, or DEFROST mode. The air is directed at
the area of the windows through which you view the
outside mirrors.
UNDERSTANDING YOUR INSTRUMENT PANEL 89
4
