Dodge 2010 Ram Chassis Cab - Manual (Page 196)

Temperature Control
The rotary knob at the center of the
control panel controls the temperature
of the interior air. You can choose your
degree of comfort by rotating the
knob. The coldest temperature setting
is to the extreme left (blue region) and
the warmest setting is to the extreme
right (red region) of the rotation.
Air Conditioning and Heating — If Equipped
Air Conditioning And Heating
194 UNDERSTANDING YOUR INSTRUMENT PANEL