Operating Tips - RAM CHASSIS CAB 2015 Owner's Manual

304 UNDERSTANDING YOUR INSTRUMENT PANEL
The operator can also select the direction of the airflow
by selecting one of the available mode settings. A/C
operation and Recirculation control can also be manually
selected in Manual operation.
NOTE: Each of these features operates independently
from each other. If any feature is controlled manually,
temperature control will continue to operate automati-
cally.

Operating Tips

NOTE: Refer to the chart at the end of this section for
suggested control settings for various weather condi-
tions.
Summer Operation
The engine cooling system must be protected with a
high-quality antifreeze coolant to provide proper corro-
sion protection and to protect against engine overheating.
OAT coolant (conforming to MS.90032) is recommended.
Refer to "Maintenance Procedures" in "Maintaining Your
Vehicle" for proper coolant selection.
Winter Operation
To ensure the best possible heater and defroster perfor-
mance, make sure the engine cooling system is function-
ing properly and the proper amount, type, and concen-
tration of coolant is used. Refer to "Maintenance
Procedures" in "Maintaining Your Vehicle" for proper
coolant selection. Use of the air Recirculation mode
during Winter months is not recommended because it
may cause window fogging.