PART 4: CONTROLS AND DISPLAYS
PB1319 (CAT. NO. 5296 ) —34— 22-01691 (R02/02)
• To defrost the windshield, select the "Defrost” mode and the
desired air source, then set the air temperature lever to “Hot” and
the blower speed to “High.” [Note: If your vehicle is equipped with
the optional in-dash air conditioner, turn the air conditioner switch
ON.] When the windshield is clear, adjust the temperature and
blower speed until comfortable.
Air Conditioning System
Your vehicle may be equipped with either of two air conditioning sys-
tems. Cab interior air is continuously recirculated and cooled by these
systems. In both systems, the compressor, receiver-dryer, and con-
denser are located in the engine compartment. (Note: In some appli-
cations, the condenser may be mounted on the cab roof.)
In one system, the evaporator and blower are located inside the
heater unit, under the passenger dashboard. Controls for this system
are located in a modified heater control head.
To cool the cab, turn on the air conditioning system, then adjust the
air temperature and blower speed until comfortable. The amount of
cooling is controlled by
• the temperature of the evaporator core
CAUTION:
•
A cold compressor can cause refrigerant to liquefy
and warp the valve plates or cause a hydraulic lock.
Warm the engine before starting the air conditioner.
•
To avoid damage to the compressor& blower motors,
turn off all controls when a system is not in use.
NOTE: Air registers are located on both sides of the cab.
They may be positioned to clear (defrost) the side windows.
Closing these nonwindshield registers may help to defrost
the windshield quicker.
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AC
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