2023 GENESIS G90 cooling

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05
Automatic Temperature Control
Mode
The Automatic Climate Control System
is controlled by setting the desired
temperature.
1. Press the AUTO button.
The mode selection, fan speed,
air intake and air-conditioning will
be controlled automatically by the
temperature setting you select.
(To select the rear seat AUTO from
the front seat, press the icon in the
climate control information screen .)
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2. When the climate control system is
being automatically controlled, fan
speed can be selected (Low/Medium/
High).

[High: Use when quick heating or
cooling is preferred.

[Medium: Use when medium fan
speed is preferred for cooling or
heating.

[Low: Use when low fan speed is
preferred for cooling or heating.3. Turn the temperature control knob
to the desired temperature. If the
temperature is set to the lowest
setting (Lo), the air conditioning
system will operate continuously.
After the interior has cooled
sufficiently, adjust the knob to
a higher temperature set point
whenever possible.
To turn the automatic operation off,
select any function of the following:

[Front windshield defroster button
(Press the button one more time
to deselect the front windshield
defroster function. The ‘AUTO’
sign will illuminate on the climate
information screen once again.)

[Fan speed control icon
The selected function will be controlled
manually while other functions operate
automatically.
For your convenience and to improve the
efficiency of the climate control, use the
AUTO button and set the temperature to
72°F (22°C).
To change the temperature unit from °C
to °F or °F to °C:
Press the AUTO button for 3 seconds
while pressing the OFF button.

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Convenience Features
Information
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Never place anything near the ambient
light/solar sensor to ensure better control
of the heating and cooling system.
Manual Temperature Control
Mode
The heating and cooling system can be
controlled manually by pushing buttons
other than the AUTO button. In this case,
the system works sequentially according
to the order of buttons selected.
When pressing any button except the
AUTO button while using automatic
operation, the functions not selected will
be controlled automatically.
1. Start the vehicle.
2. Set the mode to the desired position.
To improve the effectiveness of
heating and cooling, select the mode
according to the following:

[Heating:

[Cooling:
3. Set the temperature control to the
desired position.
4. Set the air intake control to Fresh or
Recirculation mode.
5. Set the fan speed control to the
desired speed.
6. If air conditioning is desired, turn the
air conditioning system on.
7. Press the AUTO button to convert to
full automatic control of the system.
The climate control system settings
will be maintained, even when the
vehicle is turned OFF. However, the
climate control system settings will be
initialized when the battery has been
discharged, or when the cables have
been disconnected.
In this case, adjust the climate control
system settings again.

5-136
Convenience Features
OFF
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A : Front seat control from the front,
B : Rear seat control from the front,
C : Rear seat control from the rear,
D : Front seat control from the rear
Touch the OFF icon or button to turn
the climate control system off. You can
still operate the mode and air intake
buttons as long as the Engine is in the
ON position.

[If OFF is pressed from the front seat,
the front and rear climate control
system will turn off.

[If OFF is pressed from the rear seat,
only the rear climate control system
will turn off.
System Operation
Cooling / Ventilation
1. Select the Face Level mode.
2. Set the air intake control to fresh or
recirculation mode.
3. Set the temperature control to the
desired position.
4. Set the fan speed control to the
desired speed.
Heating
1. Select the Floor Level mode.
2. Set the air intake control to fresh or
recirculation mode.
3. Set the temperature control to the
desired position.
4. Set the fan speed control to the
desired speed.
5. If desired, turn the air conditioning ON
with the temperature control knob set
to heat in order to dehumidify the air
before it enters into the cabin.
If the windshield fogs up, select the Front
Defrost
mode.
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[To keep dust or unpleasant fumes
from entering the vehicle through the
ventilation system, temporarily set the
air intake control to the recirculation
mode. Return the control to the to
Fresh mode when the unpleasant air
outside has diminished. This will help
keep the driver alert and comfortable.

[To help prevent the inside of the
windshield from fogging, set the air
intake control to fresh mode and the
fan speed to the desired position, turn
on the air conditioning system, and
adjust the temperature control to the
desired temperature.

5-137
05
Air conditioning
Your Genesis Branded Vehicle air
conditioning system is filled with
R-1234yf refrigerant.
1. Start the vehicle.
2. Press the air conditioning button.
3. Set the mode to the Face Level

mode.
4. Set the air intake control to
Recirculation mode temporarily to
allow the cabin to cool quickly. When
the desired temperature in the cabin
is reached, change the air intake
control back to Fresh mode.
5. Adjust the fan speed control and
temperature control to maintain
maximum comfort.
When maximum cooling is desired, set
the temperature control to the lowest
position, then set the fan speed control
to the highest setting.
NOTICE
When using the air conditioning system,
monitor the engine temperature gauge
closely while driving up hills or in heavy
traffic when outside temperatures are
high. Air conditioning system operation
when climbing a steep grade or in
high outside ambient temperatures
can cause engine overheating.
Continue to use the fan, but turn the air
conditioning system off if the engine
temperature gauge indicates engine
overheating.
Air conditioning system operation tips

[If the vehicle has been parked in
direct sunlight during hot weather,
open the windows for a short time
to let the hot air inside the vehicle
escape.

[After sufficient cooling has been
achieved, switch back from
recirculation mode to fresh mode.

[To help reduce moisture inside of
the windows on rainy or humid
days, decrease the humidity inside
the vehicle by operating the air
conditioning system with the windows
and sunroof closed.

[Use the air conditioning system
every month only for a few minutes
to ensure maximum system
performance.

[If you operate air conditioner
excessively, the difference between
the temperature of the outside air and
that of the windshield could cause
the outer surface of the windshield to
fog up, causing loss of visibility. In this
case, set the mode selection to the

position and fan speed control to the
lowest speed.

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Convenience Features
System Maintenance
Cabin air filter
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A : Outside air,
B : Recirculated air,
C : Climate control air filter,
D : Blower,
E : Evaporator core,
F : Heater core
The cabin air filter is installed behind
the glove box. It filters the dust or other
pollutants that enter the vehicle through
the heating and air conditioning system.
We recommend that the cabin air filter
be replaced by an authorized retailer of
Genesis Branded products according to
the maintenance schedule. If the vehicle
is being driven in severe conditions such
as dusty or rough roads, more frequent
cabin air filter inspections and changes
are required.
If the air flow rate suddenly decreases,
have the system inspected at an
authorized retailer of Genesis Branded
products.
Checking the amount of air
conditioner refrigerant and
compressor lubricant
When the amount of refrigerant is low,
the performance of the air conditioning
is reduced. Overfilling also reduces the
performance of the air conditioning
system.
Therefore, if abnormal operation is
found, have the system inspected by an
authorized retailer of Genesis Branded
products.
NOTICE
It is important that the correct type and
amount of oil and refrigerant is used.
Otherwise, damage to the compressor
and abnormal system operation may
occur. To prevent damage, the air
conditioning system in your vehicle
should only be serviced by trained and
certified technicians.
NOTICE

[The refrigerant system should only
be serviced by trained and certified
technicians to insure proper and safe
operation.

[The refrigerant system should be
serviced in a well-ventilated place.

[The air conditioning evaporator
(cooling coil) shall never be repaired
or replaced with one removed from
a used or salvaged vehicle and new
replacement MAC evaporators shall
be certified (and labeled) as meeting
SAE Standard J2842.

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Convenience Features
WARNING
Windshield heating
Do not use the
position during
cooling operation in extremely humid
weather. The difference between the
temperature of the outside air and that
of the windshield could cause the outer
surface of the windshield to fog up,
causing loss of visibility could cause
an accident resulting in serious injury
or death. In this case, set the mode
selection button to the
position
and fan speed control knob to a lower
speed.

[For maximum defrost performance,
set the temperature control to the
highest temperature setting and
the fan speed control to the highest
setting.

[If warm air to the floor is desired while
defrosting or defogging, set the mode
to the floor-defrost position.

[Before driving, clear all snow and ice
from the windshield, rear window,
side view mirrors and all side
windows.

[Clear all snow and ice from the
hood and air inlet in the cowl grill
to improve heater and defroster
efficiency and to reduce the
probability of fogging up the inside of
the windshield.
NOTICE
If the engine temperature is still cold
after starting, then a brief engine warm
up period may be required for the
vented air flow to become warm or hot.
To Defog Inside Windshield
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1. Select the desired fan speed.
2. Select the desired temperature.
3. Press the defroster button (
).
4. Fresh mode will be selected
automatically.
Check to make sure the air intake control
is in Fresh mode. If the air intake control
indicator light is illuminated, press the
button once to enable Fresh mode
(indicator light OFF).
If the
position is selected, the fan
speed is automatically increased.
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6-52
Driving Your Vehicle
Forced to Restart Engine
The engine is automatically restarted in
the following situations.

[The engine has stopped for about 5
minutes

[The air conditioning is ON with the fan
speed set to a certain high level

[The front defroster is ON

[The battery is weak

[The cooling and heating performance
of the climate control system is
unsatisfactory

[The vehicle is shifted to P (Park), N
(Neutral) or R (Reverse) when Auto
Hold is operating

[The door is opened or the seatbelt
is unfastened when Auto Hold is
activated

[The EPB switch is pressed when Auto
Hold is activated
The Auto Stop (
) indicator blinks in
green for 5 seconds on the instrument
cluster when the engine is restarted.
WARNING
When the engine is in Idle Stop mode,
the engine may restart without the
driver taking any action. Before leaving
the vehicle or working on the engine
compartment, turn off the engine by
pressing the ENGINE START/STOP
button to the OFF position.
ISG Malfunction
ISG system may not operate when there
is a malfunction with the ISG sensors or
ISG system.
The following will occur, when there is a
malfunction with the ISG system:

[The Auto Stop (
) indicator will
illuminate in yellow on the instrument
cluster.
Contact an authorized retailer of Genesis
Branded products.

6-73
06
Winter Precautions
Use high quality ethylene glycol coolant
Your vehicle is delivered with high
quality ethylene glycol coolant in the
cooling system. It is the only type of
coolant that should be used because it
helps prevent corrosion in the cooling
system, lubricates the water pump and
prevents freezing. Be sure to replace or
replenish your coolant in accordance
with the maintenance schedule in
chapter 9. Before winter, have your
coolant tested to assure that its freezing
point is sufficient for the temperatures
anticipated during the winter.
Check battery and cables
Winter temperatures affect battery
performance. Inspect the battery and
cables, as specified in chapter 9. The
battery charging level can be checked by
an authorized retailer of Genesis Branded
products or in a service station.
Change to “winter weight” oil if
necessary
In some regions during winter, it is
recommended to use the “winter
weight” oil with lower viscosity. In
addition, replace the engine oil and filter
if it is close to the next maintenance
interval. Fresh engine oil ensures
optimum engine operation during the
winter months. For further information,
refer to chapter 2. When you are not sure
about a type of winter weight oil, consult
an authorized retailer of Genesis Branded
products.Check spark plugs and ignition system
Inspect the spark plugs, as specified in
chapter 9. If necessary, replace them.
Also check all ignition wirings and
components for any cracks, wear-out,
and damage.
To prevent locks from freezing
To prevent the locks from being frozen,
spray approved de-icing fluid or glycerin
into key holes. When a lock opening is
already covered with ice, spray approved
de-icing fluid over the ice to remove it.
When an internal part of a lock freezes,
try to thaw it with a heated key. Carefully
use the heated key to avoid an injury.
Use approved window washer anti-
freeze solution in system
To prevent the window washer from
being frozen, add authorized window
washer anti-freeze solution, as specified
on the window washer container.
Window washer anti-freeze solution is
available from an authorized retailer of
Genesis Branded products, and most
vehicle accessory outlets. Do not use
engine coolant or other types of anti-
freeze solution, to prevent any damage
to the vehicle paint.
Do not let your parking brake freeze
Under some conditions your parking
brake can freeze in the engaged position.
This is most likely to happen when there
is an accumulation of snow or ice around
or near the rear brakes or if the brakes
are wet. When there is the risk that your
parking brake may freeze, temporarily
apply it with the gear in P (Park). Also,
block the rear wheels in advance, so the
vehicle may not roll. Then, release the
parking brake.