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 switches to control the functions of the cab temperature system; see Fig.:

• fan switch with recirculation button

• temperature control switch with A/C button

• air selection switch (with bunk-override button on sleeper cab only)

Fan Switch with Recirculation Button

Temperature Control Switch with Air Conditioning Button

Air Selection Switch with Bunk-Override Button

Fig. 1, Cab Climate Control Panel

The fan switch controls the fan speed, and forces fresh or recirculated air through the air outlets. To increase airflow, turn the switch clockwise to a higher number. To decrease airflow, turn the switch 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 switch is used to select the desired temperature. Turn the switch clockwise to the red area for warm air. Turn the switch 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 switch, to turn the A/C on and off.

The air selection switch 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..

Face Mode

Selection Between Face Mode and Bi-Level Mode

Bi-Level Mode

Selection Between Bi-Level Mode and Floor Mode

Floor Mode

Selection Between Floor Mode and Defog Mode

Defog Mode

Selection Between Defog Mode and Defrost Mode

Defrost Mode

Bunk-Override Button (on sleeper-cabs only)

Fig. 2, Air Selection Switch With Bunk-Override Button

Bunk-Override Button

The bunk-override button is located in the center of the cab air-selection switch (sleeper-cabs only). See Fig..

Press the bunk-override button to make the cab controls override the settings on the sleeper temperature control panel; the sleeper temperature will mimic the cab settings. An amber LED in the button is illuminated when the bunk-override mode is activated. When the override switch is not activated, the cab climate control panel can be adjusted without affecting the sleeper settings.