Cab Climate Control

The climate control panel allows you to control the heating, ventilating, defrosting, and air conditioning (A/C) functions. The cab climate control panel has three knobs to control the functions of the cab temperature system; see Fig.:

• fan knob with recirculation button

• temperature control knob with A/C button

• mode control knob (with bunk-override button on sleeper cab only)

Fan Knob

Temperature Control Knob

Mode Control Knob

Fig. 1, Cab Climate Controls

The fan knob controls the fan speed, and forces fresh or recirculated air through the air outlets. To increase airflow, turn the knob clockwise to a higher number. To decrease airflow, turn the knob counterclockwise to a lower number.

Recirculation mode limits the amount of outside air that enters the cab. Press the recirculation button to prevent dusty or smoky air from entering the cab.

The temperature control knob is used to select the desired temperature. Turn the knob clockwise to the red area for warm air. Turn the knob counterclockwise to the blue area for cool air.

The A/C cools and dehumidifies the air inside the cab. Press the A/C button, located in the center of the temperature control knob, to turn the A/C on and off.

The mode control knob allows the control of air flow through the face outlets, the floor outlets, the defrost (windshield) outlets, or a combination of these outlets. See Fig..

Note: There are intermediate modes between each knob position.

Face Mode

Bi-Level Mode

Floor Mode

Floor/Defrost Mode

Defrost Mode

All Mode

Bunk Override Button (on sleeper-cabs only)

Fig. 2, Mode Control Knob With Bunk Override Button

Bunk-Override Button

The bunk-override button is located in the center of the cab air-selection knob (sleeper-cabs only). See Fig.. The bunk override button allows the driver to make the sleeper temperature and fan settings the same as the cab's.

Press the bunk override button to copy the current cab HVAC temperature and fan settings to the sleeper HVAC. An amber indicator will illuminate when bunk override mode is activated. When in override mode, the sleeper climate control panel automatically conforms to the fan speed and temperature settings on the cab climate panel at the time the override mode is activated. Further changes of the cab climate control settings will not alter the settings of the sleeper climate control panel.

The override mode is disabled when the fan knob or temperature control knob on the sleeper climate control panel is manually set to a different setting. The override mode is also disabled when the bunk override button is pressed to the off position.