2021 RAM CHASSIS CAB climate control

GETTING TO KNOW YOUR VEHICLE57
WINDSHIELD WIPER OPERATION

Rotate the end of the lever upward, to the first
detent past the intermittent settings for low-speed
wiper operation. Rotate the end of the lever upward
to the second detent past the intermittent settings
for high-speed wiper operation.

Windshield Wiper/Washer Lever

Intermittent Wipers
The intermittent feature of this system was
designed for use when weather conditions
make a single wiping cycle, with a variable
pause between cycles, desirable. For maximum
delay between cycles, rotate the control knob
upward to the first detent.
The delay interval decreases as you rotate the
knob until it enters the low continual speed position. The delay can be regulated from a
maximum of about 18 seconds between cycles,
to a cycle every one second. The delay intervals
will double in duration when the vehicle speed
is 10 mph (16 km/h) or less.
Windshield Washers
To use the windshield washer, push the washer
knob, located on the end of the multifunction
lever, inward to the second detent. Washer fluid
will be sprayed and the wiper will operate for
two to three cycles after the washer knob is
released from this position.
If the washer knob is depressed while in the
delay range, the wiper will operate for several
seconds after the washer knob is released.
It will then resume the intermittent interval
previously selected. If the washer knob is
pushed while in the off position, the wiper will
turn on and cycle approximately three times
after the wash knob is released.
To prevent freeze-up of your windshield washer
system in cold weather, select a solution or
mixture that meets or exceeds the temperature
range of your climate. This rating information
can be found on most washer fluid containers. Mist
When a single wipe to clear off road mist or
spray from a passing vehicle is needed, push
the washer knob, located on the end of the
multifunction lever, inward to the first detent
and release. The wipers will cycle one time and
automatically shut off.
NOTE:
The mist feature does not activate the washer
pump; therefore, no washer fluid will be sprayed
on the windshield. The wash function must be
used in order to spray the windshield with
washer fluid.
For information on wiper care and replacement,
see Ú
page 380.
WARNING!

Sudden loss of visibility through the windshield
could lead to a collision. You might not see other
vehicles or other obstacles. To avoid sudden icing
of the windshield during freezing weather, warm
the windshield with the defroster before and
during windshield washer use.

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58GETTING TO KNOW YOUR VEHICLE
RAIN SENSING WIPERS — IF EQUIPPED
This feature senses rain or snowfall on the
windshield and automatically activates the
wipers. Rotate the end of the multifunction
lever to one of five detent positions to activate
this feature.

The sensitivity of the system can be adjusted with
the multifunction lever. Wiper delay position 1 is
the least sensitive, and wiper delay position 5 is
the most sensitive. Position 3 should be used for
normal rain conditions. Positions 1 and 2 can be
used if the driver desires less wiper sensitivity.
Positions 4 and 5 can be used if the driver
desires more sensitivity. Place the wiper switch in
the O (off) position when not using the system.

NOTE:
The Rain Sensing feature will not operate
when the wiper switch is in the low or
high-speed position.
The Rain Sensing feature may not function
properly when ice, or dried salt water is
present on the windshield.

Use of Rain-X or products containing wax or sili -
cone may reduce Rain Sensing performance.
The Rain Sensing feature can be turned on and
off using the Uconnect system
Ú
page 228.

The Rain Sensing system has protection
features for the wiper blades and arms, and will
not operate under the following conditions:
Low Ambient Temperature — When the igni-
tion is first placed in the ON position, the Rain
Sensing system will not operate until the
wiper switch is moved, vehicle speed is
greater than 0 mph (0 km/h), or the outside
temperature is greater than 32°F (0°C).
Transmission In NEUTRAL Position — When
the ignition is ON, and the transmission is in
the NEUTRAL position, the Rain Sensing
system will not operate until the wiper switch
is moved, vehicle speed is greater than
5 mph (8 km/h), or the gear selector is
moved out of the NEUTRAL position.
Remote Start Mode Inhibit — On vehicles
equipped with Remote Starting system, Rain
Sensing wipers are not operational when the
vehicle is in the remote start mode. Once the
operator is in the vehicle and has placed the
ignition switch in the RUN position, Rain
Sensing wiper operation can resume, if it has
been selected, and no other inhibit condi -
tions (mentioned previously) exist.
CLIMATE CONTROLS
The Climate Control system allows you to
regulate the temperature, air flow, and direction
of air circulating throughout the vehicle.
The controls are located on the touchscreen
(if equipped), on the sides of the touchscreen,
or on the instrument panel below the radio.

21_DPF_OM_EN_USC_t.book Page 58

GETTING TO KNOW YOUR VEHICLE59
AUTOMATIC CLIMATE CONTROL
D
ESCRIPTIONS AND FUNCTIONS

Uconnect 4/4C/4C NAV With 8.4–inch Display
Automatic Temperature Controls
Uconnect 4C NAV With 12–inch Display Automatic Temperature Controls
NOTE:
Icons and descriptions can vary based upon
vehicle equipment.
MAX A/C Button
Press and release the MAX A/C button
on the touchscreen to change the
current setting to the coldest output
of air. The MAX A/C indicator
illuminates when MAX A/C is on. Pressing the
button again will cause the MAX A/C operation
to exit. Pressing other settings will also cause
the MAX A/C to exit.
NOTE:
MAX A/C sets the control for maximum
cooling performance.
The MAX A/C button is only available on the
touchscreen.
A/C Button
Press and release this button on the
touchscreen, or push the button on
the faceplate to change the current
setting. The A/C indicator illuminates
when A/C is on.
Recirculation Button

Press and release this button on the
touchscreen, or push the button on the
faceplate, 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. Recirculation may be unavailable (button
on the touchscreen greyed out) 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.
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.

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60GETTING TO KNOW YOUR VEHICLE
(Continued)
Auto Button
Set your desired temperature and
press AUTO. AUTO will achieve and
maintain your desired temperature by
automatically adjusting the blower
speed and air distribution. AUTO mode is highly
recommended for efficiency.
You can turn AUTO on in one of two ways:
Press and release this button on the touch -
screen.
Push the button on the faceplate.
Toggling this function will cause the system to
switch between manual mode and automatic
mode Ú page 64.
Front Defrost Button

Press and release the Front Defrost
button on the touchscreen, or push and
release the button on the faceplate,
to change the current airflow setting
to Defrost mode. The Front Defrost indicator
illuminates when Front Defrost is on. 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. When
toggling the front defrost mode button, the climate
system will return to the previous setting.

Rear Defrost Button

Press and release the Rear Defrost
button on the touchscreen, or push
and release the button on the
faceplate, 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 10 minutes.

Driver And Passenger Temperature Up And
Down Buttons
These buttons provide the driver and passenger
with independent temperature control.
Push the red button (or rotate knob
if equipped) on the faceplate or
touchscreen, or press and slide the
temperature bar towards the red
arrow button on the touchscreen for warmer
temperature settings.
Push the blue button (or rotate knob if
equipped) on the faceplate or
touchscreen, or press and slide the
temperature bar towards the blue
arrow button on the touchscreen for cooler
temperature settings.
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.
CAUTION! (Continued)

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GETTING TO KNOW YOUR VEHICLE61
NOTE:
The numbers within the temperature display
will only appear if the system is equipped
with an automatic climate control system.
Up and down buttons are only available on
vehicles equipped with a 12-inch display.
SYNC Button

Press the SYNC button on the
touchscreen to toggle the SYNC
feature on/off. The SYNC indicator
illuminates when SYNC is on. SYNC
synchronizes the passenger temperature setting
with the driver temperature setting. Changing the
passenger’s temperature setting while in SYNC
will automatically exit this feature.

NOTE:
The SYNC button is only available on the touch -
screen.
Blower Control

Blower Control regulates the amount of
air forced through the climate control
system. There are seven blower
speeds available. Adjusting the blower
will cause automatic mode to switch to manual operation. The speeds can be selected using
either the blower control knob on the faceplate or
the buttons on the touchscreen.

Faceplate
The blower speed increases as you turn the
blower control knob clockwise from the lowest
blower setting. The blower speed decreases as
you turn the blower control knob
counterclockwise.
Touchscreen
Use the small blower icon to reduce the blower
setting and the large blower icon to increase the
blower setting. Blower can also be selected by
pressing the blower bar area between the icons.
Mode Control

Select Mode by pressing one of the
Mode buttons on the touchscreen,
or pushing the Mode button on the
faceplate, to change the airflow
distribution mode. The airflow distribution
mode can be adjusted so air comes from the
instrument panel outlets, floor outlets, defrost
outlets, and demist outlets.
Faceplate
Push the Mode Button to change the airflow
distribution mode. The airflow distribution mode
can be adjusted so air comes from the
instrument panel outlets, floor outlets, defrost
outlets and demist outlets.
Touchscreen
Press one of the “MODE” buttons to change
the airflow distribution mode. The airflow
distribution mode can be adjusted so air comes
from the instrument panel outlets, floor outlets,
defrost outlets and demist outlets.
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
moved up and down or side to side to regulate
airflow direction. There is a shut off wheel
located below the air vanes to shut off or adjust
the amount of airflow from these outlets.
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62GETTING TO KNOW YOUR VEHICLE
Bi-Level Mode

Air comes from the instrument panel
outlets and floor outlets. A slight amount
of air is directed through the defrost and
side window demister outlets.

NOTE:
Bi-Level mode is designed under comfort condi -
tions to provide cooler air out of the panel
outlets and warmer air from the floor outlets.
Floor Mode
Air comes from the floor outlets.
A slight amount of air is directed
through the defrost and side window
demister outlets.
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 the OFF button on
the touchscreen, or push the OFF
button on the faceplate (if equipped)
to turn the Climate Control on/off.
MANUAL CLIMATE CONTROL
D
ESCRIPTIONS AND FUNCTIONS

Uconnect 3 With 5-inch Display Manual Temperature
Controls

MAX A/C Setting
Set the temperature control knob to
the MAX A/C setting to change the
current setting to the coldest output
of air. Moving the temperature control
knob away from the MAX A/C setting causes the
MAX A/C operation to exit.
A/C Button
Push the A/C button to engage the Air
Conditioning (A/C). The A/C indicator
illuminates when A/C is on.
Recirculation Button

Push the Recirculation 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 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 vehicles equipped with the Manual Climate
Controls system, the Recirculation mode is not
allowed in Defrost mode to improve window
clearing operation. Recirculation is disabled
automatically if this mode is selected.

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GETTING TO KNOW YOUR VEHICLE63
Attempting to use Recirculation while in this
mode causes the LED in the control button to
link, and then turn off.
Front Defrost Setting

Turn the mode control knob to the
Front Defrost mode setting. 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
10 minutes.

Temperature Control
Temperature Control regulates the temperature
of the air forced through the climate system.
The temperature increases as you
turn the temperature control knob
clockwise. The temperature decreases as you
turn the temperature control knob
counterclockwise.
Blower Control
Blower Control regulates the amount
of air forced through the climate
control system. There are seven
blower speeds available. The blower
speed increases as you turn the blower control
knob clockwise from the lowest blower setting.
The blower speed decreases as you turn the
blower control knob counterclockwise.
Mode Control
Turn the mode control knob to adjust
airflow distribution. The airflow
distribution mode can be adjusted so
air comes from the instrument panel
outlets, floor outlets, defrost outlets and demist
outlets.
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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21_DPF_OM_EN_USC_t.book Page 63

GETTING TO KNOW YOUR VEHICLE65
CLIMATE VOICE RECOGNITION
Adjust vehicle temperatures hands-free and
keep everyone comfortable while you keep
moving ahead.
Push the VR button on the steering wheel. After
the beep, say one of the following commands:
“Set driver temperature to 70 degrees ”
“Set passenger temperature to 70 degrees ”

Did you know: Voice Command for Climate may only
be used to adjust the interior temperature of your
vehicle. Voice Command will not work to adjust the
heated seats or steering wheel if equipped.

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. OAT coolant
(conforming to MS.90032) is recommended.
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.

Vacation/Storage

For information on maintaining the Climate
Control system when the vehicle is being stored
for an extended period of time, see
Ú
page 427.

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 , 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 on and set the
mode control to the position.
Cool Sunny Operate in position.
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