Climate Control Functions; Operating Tips - RAM Commercial PROMASTER Cargo Van 2019 User Manual

Climate Control Functions

A/C (Air Conditioning)
The Air Conditioning (A/C) button allows the
operator to manually activate or deactivate
the air conditioning system. When the air
conditioning system is turned on, cool dehu-
midified air will flow through the outlets into
the cabin. For improved fuel economy, press
the A/C button to turn off the air conditioning
and manually adjust the blower and airflow
mode settings. Also, make sure to select only
Panel, Bi-Level or Floor modes.
NOTE:
• For Manual Climate Controls, if the system
is in Mix, Floor or Defrost Mode, the A/C can
be turned off, but the A/C system shall
remain active to prevent fogging of the
windows.
• If fog or mist appears on the windshield or
side glass, select Defrost mode, and in-
crease blower speed if needed.
• If your air conditioning performance seems
lower than expected, check the front of the
A/C condenser (located in front of the ra-
diator), for an accumulation of dirt or in-
sects. Clean with a gentle water spray from
the front of the radiator and through the
condenser.
Recirculation
In cold weather, use of Recirculation mode
may lead to excessive window fogging. The
Recirculation feature may be unavailable if
conditions exist that could create fogging on
the inside of the windshield. On systems with
Manual Climate Controls, the Recirculation
mode is not allowed in Defrost mode to im-
prove window clearing operation. Recircula-
tion is disabled automatically if this mode is
selected. Attempting to use Recirculation
while in this mode causes the LED in the
control button to blink and then turns off.

Operating Tips

Summer Operation
The engine cooling system must be protected
with a high-quality antifreeze coolant to pro-
vide proper corrosion protection and to pro-
tect against engine overheating. A solution of
50% OAT (Organic Additive Technology) cool-
ant that meets the requirements of FCA Ma-
terial Standard MS.90032 and 50% water is
recommended. Refer to "Fluids And Lubri-
cants" in "Technical Specifications" in your
Owner's Manual for proper coolant selection.
Winter Operation
Use of the air Recirculation mode during
winter months is not recommended because
it may cause window fogging.
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