climate settings RAM PROMASTER 2021 Owners Manual

32GETTING TO KNOW YOUR VEHICLE
Recirculation Button
Press and release this button to
change the system between
recirculation mode and outside air
mode. The Recirculation indicator and
the A/C indicator illuminate when the
Recirculation button is pressed. Recirculation
can be used when outside conditions such as
smoke, odors, dust, or high humidity are
present. Recirculation can be used in all modes
except for Defrost. Recirculation may be
unavailable if conditions exist that could create
fogging on the inside of the windshield. The A/C
can be deselected manually without disturbing
the mode control selection. Continuous use of
the Recirculation mode may make the inside air
stuffy and window fogging may occur. Extended
use of this mode is not recommended.
On systems with Manual Climate Controls, if
equipped, the Recirculation mode is not
allowed in Defrost mode to improve window
clearing operation. Recirculation 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.
Front Defrost Mode
Turn the mode control knob to the
Front Defrost position. Air comes from
the windshield and side window
demist outlets. When the defrost
button is selected, the blower level may
increase. Use Defrost mode with maximum
temperature settings for best windshield and
side window defrosting and defogging.
Rear Defrost Button
Push and release the Rear Defrost
Control button to turn on the rear
window defroster and the heated
outside mirrors (if equipped). The
Rear Defrost indicator illuminates when the rear
window defroster is ON. The rear window
defroster automatically turns OFF after
20 minutes.
CAUTION!
Failure to follow these cautions can cause
damage to the heating elements:
Use care when washing the inside of the
rear window. Do not use abrasive window
cleaners on the interior surface of the
window. Use a soft cloth and a mild
washing solution, wiping parallel to the
heating elements. Labels can be peeled off
after soaking with warm water.
Do not use scrapers, sharp instruments, or
abrasive window cleaners on the interior
surface of the window.
Keep all objects a safe distance from the
window.

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34GETTING TO KNOW YOUR VEHICLE
ADDITIONAL REAR CLIMATE CONTROL —
I
F 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.

Additional Rear Climate Controls Switches

Rear Blower Control
Push this button to turn on the rear
climate controls. An indicator light will
turn on when the rear climate control
is on.
Rear Temperature Control
Rear Passenger Temperature Up
Button To change the temperature in
the rear of the vehicle, push
temperature control up button to
raise the temperature.
Rear Passenger Temperature Down
Button To change the temperature in
the rear of the vehicle, push
temperature control down button to
lower the temperature.
Rear MODE Button
Push this button to change the air
distribution mode for the rear
passengers.
OPERATING TIPS
NOTE:
Refer to the chart at the end of this section for
suggested control settings for various weather
conditions.
Summer Operation
The engine cooling system must be protected
with a high-quality antifreeze coolant to provide
proper corrosion protection and to protect
against engine overheating. A solution of 50%
OAT (Organic Additive Technology) coolant that
meets the requirements of FCA Material
Standard MS.90032 and 50% water is
recommended Ú page 268.
Winter Operation
To ensure the best possible heater and
defroster performance, make sure the engine
cooling system is functioning properly and the
proper amount, type, and concentration of
coolant is used. Use of the air Recirculation
mode during Winter months is not
recommended because it may cause
window fogging.

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GETTING TO KNOW YOUR VEHICLE35
Vacation Storage
For information on maintaining the Climate
Control system when the vehicle is being stored
for an extended period of time, see
Úpage 260.
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
plenum, they could plug the water drains. In
Winter months, make sure the air intake is clear
of ice, slush, and snow.
Cabin Air Filter
The Climate Control system filters out dust and
pollen from the air. Contact an authorized
dealer to service your cabin air filter, and to
have it replaced when needed.
Operating Tips Chart
WEATHER CONTROL
SETTINGS
Hot Weather And
Vehicle Interior Is Very Hot Set the mode control
to (Panel mode), (A/C) on, and
blower on high. Roll
down the windows for a minute to flush out
the hot air. Adjust the
controls as needed to achieve comfort.
Warm Weather Turn (A/C) on and
set the mode control
to the (Panel Mode) position.
Cool Sunny Operate in
(Bi-Level Mode) position.
Cool & Humid Conditions Set the mode control
to (Mix Mode) and
turn on (A/C) to
keep windows clear.
Cold Weather Set the mode control
to the (Floor
Mode) position. If
windshield fogging
starts to occur, move
the control to the (Mix Mode) position.
WEATHER CONTROL
SETTINGS
2

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