Jeep Grand Cherokee SRT 2018, Owner'S Manual, Page: 58 / 666

Recirculation
When outside air contains smoke, odors, or high
humidity, or if rapid cooling is desired, you may
wish to recirculate interior air by pressing the
Recirculation control button. The Recirculation
indicator will illuminate when this button is se-
lected. Press the button a second time to turn off
the Recirculation mode and allow outside air
into the vehicle.
NOTE:
In cold weather, use of Recirculation mode may
lead to excessive window fogging. The Recircu-
lation feature may be unavailable (button on the
touchscreen greyed out) if conditions exist that
could create fogging on the inside of the wind-
shield.
Automatic Temperature Control
(ATC) — If Equipped
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 set-
tings. You will experience the greatest effi-
ciency 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 US/Metric
customer-programmable feature. Refer to the
“Uconnect Settings” in “Multimedia” for fur-
ther information.
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.
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 (con-
forming 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
Before you store your vehicle, or keep it out of
service (i.e., vacation) for two weeks or more,
run the air conditioning system at idle for about
five minutes, in fresh air with the blower setting
on high. This will ensure adequate system lubri-
cation to minimize the possibility of compressor
damage when the system is started again.
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