RAM 2013 CHASSIS CAB 3500 Owner's Manual page 260

258 UNDERSTANDING YOUR INSTRUMENT PANEL
Next, adjust the temperature you would like the system
to maintain by adjusting the driver and passenger tem-
perature hard or soft control buttons. Once the desired
temperature is displayed, the system will achieve and
automatically maintain that comfort level.
When the system is set up for your comfort level, it is not
necessary to change the settings. You will experience the
greatest efficiency by simply allowing the system to
function automatically.
NOTE:
It is not necessary to move the temperature settings for
cold or hot vehicles. The system automatically adjusts the
temperature, mode, and blower speed to provide comfort
as quickly as possible.
The temperature can be displayed in U.S. or Metric units
by selecting the US/M customer-programmable feature.
Refer to the "Uconnect Access System Settings" in this
section of the manual.
To provide you with maximum comfort in the Automatic
mode, during cold start-ups the blower fan will remain
on low until the engine warms up. The blower will
increase in speed and transition into Auto mode.
Recirculation Control
When outside air contains smoke, odors, or
high humidity, or if rapid cooling is desired,
you may wish to recirculate interior air by
pressing the RECIRCULATION control button.
Recirculation mode should only be used temporarily. The
recirculation LED will illuminate on the blower control