RAM CHASSIS CAB 2021 Repair Manual

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.

2

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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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64GETTING TO KNOW YOUR VEHICLE
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.
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.
AUTOMATIC TEMPERATURE
C
ONTROL (ATC)
Automatic Operation

1. Push the AUTO button on the faceplate, or
the AUTO button on the touchscreen on the
Automatic Temperature Control (ATC)
Panel.

2. Next, adjust the temperature you would like the system to maintain by adjusting the
driver and passenger temperature control
buttons. Once the desired temperature is
displayed, the system will achieve and
automatically maintain that comfort level. 3. When the system is set up for your comfort
level, it is not necessary to change the
settings. You will experience the greatest
efficiency by simply allowing the system to
function automatically.
NOTE:
It is not necessary to move the temperature
settings for cold or hot vehicles. The system
automatically adjusts the temperature,
mode, and blower speed to provide comfort
as quickly as possible.
The temperature can be displayed in U.S. or
Metric units by selecting the U.S./Metric
within Uconnect Settings Ú page 228.
To provide you with maximum comfort in the
Automatic mode during cold start-ups, the
blower fan will remain on low until the engine
warms up. The blower will increase in speed
and transition into Auto mode.
Manual Operation Override
This system offers a full complement of manual
override features. The AUTO symbol in the front
ATC display will be turned off when the system
is being used in the manual mode.

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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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66GETTING TO KNOW YOUR VEHICLE
INTERIOR STORAGE AND EQUIPMENT
STORAGE
Glove Compartment
The glove compartment is located on the
passenger side of the instrument panel and
features both an upper and lower storage area.
NOTE:
Not all vehicles are equipped with a door over
the upper storage area.

Glove Compartment
If equipped with a covered upper glove
compartment, push the release button to open.
To open the lower glove compartment, pull the
release handle.
Door Storage
Front Door Storage — If Equipped
Storage areas and bottle holders (driver’s side
only) are located in the door trim panels.
Rear Door Storage — If Equipped
Storage compartments are located in both the
driver and passenger rear door trim panels.
Cool & Humid
Conditions Set the mode control
to position and turn on to keep windows clear.
Cold Weather Set the mode control to
the position.
If windshield fogging
starts to occur, move the
control to the position.
WEATHER CONTROL SETTINGS
1 — Upper Glove Compartment Release Button
(If Equipped)
2 — Upper Glove Compartment
3 — Lower Glove Compartment
WARNING!
Do not operate this vehicle with a glove
compartment in the open position. Driving
with the glove compartment open may result
in injury in a collision.

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GETTING TO KNOW YOUR VEHICLE67
(Continued)
Center Storage Compartment — If
Equipped

The center storage compartment is located between
the driver and passenger seats. The storage
compartment provides an armrest and contains
both an upper and lower storage area.
Center Storage Compartment
Pull the upper handle on the front of the
armrest to raise the cover. The upper storage
area contains a USB port that can be used to
power small electrical devices.

Center Storage Compartment Upper Storage USB Port

With the upper lid closed, pull the lower handle
to open the lower storage bin. The lower bin
contains a power inverter. There is also a “fill
line” located along the rear inside wall of the
lower bin. Contents above the “fill line” may
interfere with cupholder placement if equipped
with a premium center console.
WARNING!
This armrest is not a seat. Anyone seated
on the armrest could be seriously injured
during vehicle operation, or a collision.
In a collision, the latch may open if the total
weight of the items stored exceeds about
10 lbs (4.5 kg). These items could be
thrown about endangering occupants of
the vehicle. Items stored should not exceed
a total of 10 lbs (4.5 kg).
1 — Upper Console Handle
2 — Lower Console Handle
WARNING! (Continued)
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68GETTING TO KNOW YOUR VEHICLE

Forward Portion Of Lower Storage Bin
Premium Center Console — If Equipped
The premium center console is equipped with
two front storage bins located in front of the
center storage compartment. These storage
bins may be equipped with tandem doors. Push
the front bin to access the cupholders, or push
the rear bin to access the coin holder/small
storage bin.

Center Console Tandem Doors— If Equipped Tandem Doors Open Position

1 — Wireless Charging Pad
2 — Power Inverter
3 — Storage Area
WARNING!
Do not operate this vehicle with a console
compartment lid in the open position. Driving
with the console compartment lid open may
result in injury in a collision.
1 — Push Front Bin Access
2 — Push Rear Bin Access
1 — Front Bin Open
2 — Rear Bin Open

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