2021 HYUNDAI SONATA temperature

05
5-135
System Operation
Cooling / Ventilation
1. Select the Face Level mode.
2.

Se

t the air intake control to fresh
mode.
3.

Se

t the temperature control to the
desired position.
4.
Se

t the fan speed control to the
desired speed.
Heating
1. Select the Floor L evel mode.
2.

Se

t the air intake control to fresh
mode.
3.

Se

t the temperature control to the
desired position.
4.
Se

t the fan speed control to the
desired speed.
5.

If desir

ed, 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 Floor
& Defrost
mode or press the Front
Defrost mode.
Operation Tips
• To keep dust or unpleasant fumes
from entering the car 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.
Air conditioning
Your HYUNDAI vehicle air conditioning
system is filled with R-1234yf refrigerant.
1.

S
tart the engine.
2.

Pr
ess the air conditioning button.
3.

Se
t the mode to the Face Level

mode.
4.
Se

t 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.

A

djust the fan speed control and
temperature control to maintain
maximum comfort.
When maximum cooling is desired, set
the temperature control to the MAX A/C
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.
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.

Convenient Features
5-136
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 the
recirculated air to the fresh outside air
position.
• 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 knob
or button to the
position and fan
speed control to the lower speed.
System Maintenance
Cabin air filter
OIK047401L[A] : Outside air, [B] : Recirculated air
[C] : Cabin 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.
Have the cabin air filter replaced by an
authorized HYUNDAI dealer 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,
the system should be checked at an
authorized HYUNDAI dealer.

Convenient Features
5-138
WinDshielD De F rosting A n D De Fogging
WARNING
Windshield heating
Do not use the
or 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 knob or button to the

position and fan speed control knob or
button to a lower speed.
• For maximum defrost performance,
set the temperature control knob
to the highest temperature setting
(rotated all the way to the right) 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 you start the vehicle when the
weather is cold, more adequate way to
heat the cabin is described below.
1.

T
urn off or lower the blower, right
after engine starting, because
engine temperature is still low and
the air flow is cold.
2.

A
fter few minutes of engine warm
up, turn the blower to low to medium
speed and set the temperature
control to Hot.
Manual Climate Control System
To defog inside windshield
ODN8A059125
[A] : Type A, [B] : Type B
1. Select an y fan speed except “0”
position.
2.

Select desir
ed temperature.
3.

Select the or position.
4.

F

resh mode air will be selected
automatically. Additionally, the
air conditioning (if equipped) will
automatically operate if the mode is
selected to the
position.
If the air conditioning and fresh mode
are not selected automatically, press the
corresponding button manually.

05
5-139
To defrost outside windshield
ODN8A059126
[A] : Type A, [B] : Type B
1. Set the fan speed to the highest setting (knob rotated all the way to
the right).
2.

Se
t the temperature control to the
highest temperature setting.
3.

Select the position.
4.

F

resh mode air and air conditioning
(if equipped) will be selected
automatically.
Automatic Climate Control
System
To defog inside windshield
ODN8059124
1. Select desir ed fan speed.
2.
Select desir
ed temperature.
3.

Pr
ess the defroster button (
).
4.

The air

-conditioning will turn on
according to the detected ambient
temperature, fresh mode and
higher fan speed will be selected
automatically.
If the air-conditioning, fresh mode
and higher fan speed are not selected
automatically, adjust the corresponding
button or knob manually.
If the
position is selected, lower fan
speed is controlled to higher fan speed.

Convenient Features
5-140
To defrost outside windshield
ODN8059127
1. Set fan speed to the highest position.
2.
Se
t temperature to the extreme hot
(HI) position.
3.

Pr
ess the defroster button (
).
4.

The air

-conditioning will turn on
according to the detected ambient
temperature and fresh mode will be
selected automatically.
If the
position is selected, lower fan
speed is controlled to higher fan speed.
Defogging Logic
To reduce the probability of fogging
up the inside of the windshield, the air
intake or air conditioning are controlled
automatically according to certain
conditions such as
or position.
To cancel or return the defogging logic,
do the following.
Manual climate control system
1. Turn the ignition switch to the ON position.
2.

Select de
froster mode (
).
3.

Pr

ess the air intake control button at
least 5 times within 3 seconds. The
process should be completed within
10 seconds after the defroster mode
(
) is selected.
The LED indicator on the air intake
button will blink 3 times to indicate that
the defogging logic has been disabled.
Repeat the steps again to re-enable the
defogging logic.
If the battery has been discharged or
disconnected, it resets to the defog logic
status.
Automatic climate control system
1. Turn the ignition switch to the ON position.
2.

Pr
ess the defroster button (
).
3.

While pr

essing the air conditioning
button (A/C), press the air intake
control button at least 5 times within 3
seconds.
The automatic climate control
information screen will blink 3 times to
indicate that the defogging logic has
been disabled.
Repeat the steps again to re-enable the
defogging logic.
If the battery has been discharged or
disconnected, it resets to the defog logic
status.

05
5-141
Auto Defogging System (Only
for Automatic Climate Control
System, if equipped)
ODN8059215
Auto defogging helps reduce the
possibility of fogging up the inside of the
windshield by automatically sensing the
moisture on inside the windshield.
The auto defogging system operates
when the heater or air conditioning is on.
0024003800370032
When the Auto Defogging
System operates, the
indicator will illuminate.
If a high amount of humidity is detected
in the vehicle, the Auto Defogging
System will be enabled.
The following steps will be performed
automatically:
Step 1) The A/C button will turn ON.
Step 2)

The air in
take control will change
to Fresh mode under low outside
temperature.
Step 3)

The mode will be changed t
o
defrost to direct airflow to the
windshield.
Step 4)

The f
an speed will be increased.
To cancel or reset the Auto Defogging
System
Press the front windshield defroster
button for 3 seconds when the ignition
switch is in the ON position.
When the Auto Defogging System is
canceled, defrost button indicator will
blink 3 times.
When the Auto Defogging System is
reset, defrost button indicator will blink 6
times without a signal.
Information
• When the air c onditioning is turned
on by Auto defogging system, if you
try to turn off the air conditioning,
the indicator will blink 3 times and
the air conditioning will not be
turned off.
•

T
o maintain the effectiveness and
efficiency of the Auto Defogging
System, do not select Recirculation
mode while the system is operating.
•

When the A
uto Defogging System is
operating, the fan speed adjustment
knob, the temperature adjustment
knob, and the air intake control
button are all disabled.
NOTICE
Do not remove the sensor cover located
on the upper end of the driver side
windshield glass.
Damage to system parts could occur
and may not be covered by your vehicle
warranty.

05
5-143
climATe conTrol ADDiTionAl feATUreS
Sunroof Inside Air Recirculation
(if equipped)
When the sunroof is opened, outside
(fresh) air will be automatically selected.
At this time, if you press the air intake
control button, recirculated air position
will be selected but will change back
to outside (fresh) air after 3 minutes.
When the sunroof is closed, the air
intake position will return to the original
position that was selected.
Automatic Ventilation
The system automatically selects the
fresh mode when the climate control
system operates Floor-Level or Bi-Level
for more than 5 minutes and the outdoor
temperature is under 59°F (15°C).

Convenient Features5-144
WARNING
Never store cigarette lighters, propane
cylinders, or other flammable/explosive
materials in the vehicle. These items
may catch fire and/or explode if the
vehicle is exposed to hot temperatures
for extended periods.
WARNING
ALWAYS keep the storage compartment
covers closed securely while driving.
Items inside your vehicle are moving as
fast as the vehicle. If you have to stop
or turn quickly, or if there is a crash, the
items may fly out of the compartment
and may cause an injury if they strike
the driver or a passenger.
NOTICE
To avoid possible theft, do not leave
valuables in the storage compartments.
Center Console Storage
ODN8059216
To open:
Grab and hold the latch on the arm rest
then lift the lid.
Glove Box
ODN8059217
To open:
Pull the lever (1).
WARNING
ALWAYS close the glove box door after
use.
An open glove box door can cause
serious injury to the passenger in an
accident, even if the passenger is
wearing a seat belt.
STor AG e compA rT men T