OPERATOR'S MANUAL

HEATER-AIR CONDITIONING CONTROLS CONTROLS AND DISPLAY

– 68 – Y53-6027

Medium Duty (R05/09)

•.

NOTE: For vehicles equipped with the Peterbilt

Comfort Control (PCC) option: The PCC option

lets the temperature knob function as a thermo-

stat that regulates duct temperatures based on

the knob settings. When active, the “COMFORT

CONTROL” icon (F) will be illuminated under the

temperature knob (C).

Conventional Cab Control Panel (vehicle with air condi-

tioner and PCC)

• To heat the cab, select the desired air mode and set

the temperature knob to hot (the red position on the

control) and the blower to whatever speed makes you

most comfortable.

• 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.

WARNING! Do not drive with visibility reduced

by fog, condensation, or frost on the wind-

shield. Your view may be obscured, which

could result in an accident involving causing

death or personal injury. For clear visibility

and safe driving, it is extremely important for

you to follow the instructions pertaining to the

function and use of the ventilation/heating

and defogging/defrosting system. If in doubt,

consult your dealer. Maximum heating output

and fast defrosting can be obtained only after

the engine has reached operating tempera-

ture.

02980A