RAM Commercial ProMaster 2024, Owner'S Manual, Page: 58 / 284

Floor Mode
Air comes from the floor outlets. A slight
amount of air is directed through the defrost
and side window demister outlets.
Defrost Mode
Air comes from the windshield and side win-
dow demist outlets. When the defrost button
is selected, the blower level may increase.
Use Defrost mode with maximum tempera-
ture settings for best windshield and side window
defrosting and defogging. When toggling the front
defrost mode button, the Climate Control system will
return to the previous setting.
Mix Mode
Air is directed through the floor, defrost, and
side window demister outlets. This setting
works best in cold or snowy conditions that
require extra heat to the windshield. This
setting is good for maintaining comfort while reducing
moisture on the windshield.
Climate Control OFF Button
Press and release this button to turn the
Climate Control ON/OFF.
ADDITIONAL REAR CLIMATE
CONTROL — IF EQUIPPED
These switches, mounted on the instrument panel to
the left of the steering column, activate the additional
rear heating/air conditioning system.
NOTE:
These switches must be enabled for operation by the
Upfitter.
Rear Blower Control — If Equipped
Push this button to turn on the rear climate
controls. An indicator light will turn on when
the rear climate control is on.
OPERATING TIPS
Refer to the chart at the end of this section for sug-
gested control settings for various weather conditions.
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 overheat-
ing. OAT coolant (conforming to MS.90032) is
recommended.
Winter Operation
To ensure the best possible heater and defroster perfor-
mance, make sure the engine cooling system is func-
tioning properly and the proper amount, type, and con-
centration of coolant is used. Use of the Air
Recirculation mode during Winter months is not recom-
mended, because it may cause window fogging.
Vacation Storage
For information on maintaining the Climate Control sys-
tem when the vehicle is being stored for an extended
period of time, see
page 257.
Window Fogging
Vehicle windows tend to fog on the inside in mild, rainy,
and/or humid weather. To clear the windows, select
Defrost or Mix mode and increase the front blower
speed. Do not use the Recirculation mode without A/C
for long periods, as fogging may occur.
Outside Air Intake
Make sure the air intake, located directly in front of the
windshield, is free of obstructions, such as leaves.
Leaves collected in the air intake may reduce airflow,
and if they enter the air distribution box, they could plug
the water drains. In Winter months, make sure the air
intake is clear of ice, slush, and snow.
Additional Rear Climate Controls Switches
56 GETTING TO KNOW YOUR VEHICLE