Dodge 2004 Ram Pickup 3500 - Manual (Page 185)

CLIMATE CONTROLS
The controls for the heating and ventilation system in this
vehicle consist of a series of rotary knobs. These comfort
controls can be set to obtain desired interior conditions.
Heater Only — Fleet Vehicles
The mode control (at the right of the
control panel) can be set in any of the
following positions:
UNDERSTANDING YOUR INSTRUMENT PANEL 185
4