Plymouth Gran Fury 1980 Operating Instructions And Product Information page 28

Window Fogging
In mild butrainyorhumid weather,carwindowsmaytend to fog
on the inside. To clear the fog off all the windows, push the Norm
AIC
button. Adjust the temperature control lever and fan speed to
maintain comfort.
Interior fogging on the windshield can be quickly removed by
depressing the DEFROST button.
Summer Operation
Air conditioned cars must be protected with a high-quality anti-
freeze coolant during the summer to provide proper corrosion
protection and to raise the boiling point of the coolant for protec-
tion against overheating. A 50% concentration is recommended.
When using the air conditioner in extremely heavy traffic in hot
weather, especially when towing a trailer, additional engine cool-
ing may be required. H this situation is encountered, operate the
transmission in a lower gear. When stopped in heavy traffic, it
may be necessary to shift into NEUTRAL and depress the ac-
celerator slightly for fast idle operation.
Winter Operation
When operating the system during the winter months, make sure
the air intake, which is located directly in front of the windshield,
26 is free of ice, slush, or other obstructions.
SEMI-AUTOMATIC TEMPERATURE CONTROL
(Optional)
This air conditioning system allows more precise control of the
temperature inside the car than is possible with conventional
systems.
The comfort control lever can be set to regulate the car interior
temperature in any mode selected except MAX A/C.
Place the lever at the desired comfort setting, usually in the white
range of the control scale, and the system will maintain the in-car
temperature at the selected level. H you wish to raise or lower the
temperature, a very slight adjustment of the lever will be suffi-
cient.
The temperature control sensor will not react to the in-car tem-
perature until the system has been operating for a short time.
Therefore, in unusual situations, such as driving from a warm
garage into cold weather, you may experience a brief period of
temperature instability until the system senses an in-car temper-
ature change.
Fan Switch
The fan can be operated at speeds ranging from LO at the bottom,
to HI at the top, to regulate the amount of air forced through the
car. Only the top two positions affect airflow when the MAX AJC
button is depressed.