PART 4: CONTROLS AND DISPLAYS DASH-MOUNTED FEATURES
(R10/06) Y53-6007 – 37 –
portant for you to follow the instructions per-
taining to the function and use of the
ventilation/heating and defogging/defrosting
system. If in doubt, consult your dealer. Maxi
-
mum heating output and fast defrosting can
be obtained only after the engine has reached
operating temperature.
CAUTION: During extreme cold weather, do
not blow hot defroster air onto cold wind-
shields. This could crack the glass. Turn the
air flow control lever to Defrost and adjust the
fan speed accordingly while the engine
warms. If the engine is already warm, move
the temperature selector to Cool, then gradu
-
ally increase the temperature when you see
that the windshield is starting to warm up.
• To defog the windshield, select the Defrost mode
and turn the blower speed to high. Set the tempera
-
ture knob to hot (the red position on the control). The
air conditioner is automatically activated to remove
moisture from the cab. After the windshield is clear,
adjust the mode, blower speed, and temperature to
your comfort.
• To cool the cab, turn on the A/C switch, set the tem-
perature knob to cool (the blue position on the con-
trol), and the blower to high until the cab becomes
cool. Then you can turn down the blower if you wish.
For Efficient Cooling:
1. Be sure all heater - air conditioner controls are off.
2. Start the engine. Allow time for warm-up.
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.
• Turn off all controls when the system is not
in use. Doing so will avoid damage to the
air conditioning system components.
3. Set the air control in the RECIRC mode.
4. Close all windows.
5. Idle the engine between 1000 and 1500 RPM and
turn the blower speed control to high.
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