RAM 2012 Truck Chassis cab, Owner'S Manual, Page: 272 / 506

blower will engage immediately if the Defrost mode is
selected, or by adjusting the blower control knob and
setting the fan to any fixed speed.
Manual Operation
This system offers a full complement of manual override
features.
NOTE: Each of these features operate independently
from each other. If any one feature is controlled manually,
the temperature doors will continue to operate automati-
cally.
There are six fixed blower speeds. Use
this control to regulate the amount of
air forced through the system in any
mode you select. The blower speed
increases as you move the control
clockwise from the OFF position.
The blower fan speed can be set to any fixed speed by
adjusting the blower control knob. The fan will now
operate at a fixed speed until additional speeds are
selected. This allows the front occupants to control the
volume of air circulated in the vehicle and cancel the
Auto mode.
The operator can also select the direction of the airflow
by selecting one of the following positions.
Panel Mode
Air comes from the outlets in the instrument panel.
Each of these outlets can be individually adjusted to
direct the flow of air. The air vanes of the center outlets
and outboard outlets can be rotated to regulate or shut off
the airflow from these outlets.
Bi-Level Mode
Air comes from the instrument panel outlets, floor
outlets and defrost outlets.
Blower Control
270 UNDERSTANDING YOUR INSTRUMENT PANEL