2023 HYUNDAI SONATA heating

Instrument Cluster
4-6
NOTICE
If the gauge pointer moves beyond
the normal range area toward the "H"
position, it indicates overheating that
may damage the engine.
Do not continue driving with an
overheated engine. If your engine
overheats, refer to "If the Engine
Overheats" in chapter 7.
WARNING
Never remove the radiator cap or
reservoir cap when the engine is hot.
The engine coolant is under pressure
and could severely burn. Wait until the
engine is cool before adding coolant to
the reservoir. Fuel gauge
„„Type A, B
ODN8A049040
„„Type C
ODN8A049007
„„Type D
OCN7040011
This gauge indicates the approximate
amount of fuel remaining in the fuel tank.

5
Manual Climate Control System .......................................................................... 5-105
Heating and Air Conditioning .............................................................................. 5-106
System Operation ................................................................................................... 5-111
System Maintenance ............................................................................................. 5-112
Automatic Climate Control System ........................................................... 5-114
Automatic Heating and Air Conditioning .............................................................5-115
Manual Temperature Control Mode ..................................................................... 5-116
System Operation .................................................................................................. 5-122
System Maintenance ............................................................................................ 5-123
Windshield Defrosting and Defogging ......................................................5-125
Manual Climate Control System........................................................................... 5-125
Automatic Climate Control System...................................................................... 5-126
Defogging Logic .................................................................................................... 5-127
Auto Defogging System (Only for Automatic Climate Control System) ............5-128
Defroster ................................................................................................................ 5-129
Climate Control Additional Features ........................................................5-130
Sunroof Inside Air Recirculation .......................................................................... 5-130
Automatic Ventilation .......................................................................................... 5-130
Storage Compartment ................................................................................ 5-131
Center Console Storage ......................................................................................... 5-131
Glove Box ................................................................................................................ 5-131
Interior Features .......................................................................................... 5-132
Cup Holder ............................................................................................................. 5-132
Sunvisor ................................................................................................................. 5-133
Power Outlet .......................................................................................................... 5-133
USB Charger .......................................................................................................... 5-134
Wireless Cellular Phone Charging System ..........................................................5-135
Clock ...................................................................................................................... 5-137
Clothes Hanger ...................................................................................................... 5-137
Floor Mat Anchor(s) ............................................................................................... 5-138
Infotainment System .................................................................................. 5-139
USB and iPod® Port ............................................................................................... 5-139
Antenna .................................................................................................................. 5-139
Steering Wheel Audio Control ............................................................................. 5-140
Bluetooth ® Wireless Technology Hands-Free .....................................................5-141
Audio (Display Audio) / Video / Navigation System (AVN) ................................5-141
5. Convenience Features

Convenience Features
5-106
Heating and Air Conditioning
1. Start the engine.
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
mode or recirculation mode position.
5. Set the fan speed control to the desired speed.
6. If air conditioning is desired, turn the air conditioning system on.
When starting the vehicle in cold weather
a more efficient way to heat the passen -
ger compartment is to do the following.
- Turn off or lower the blower, right after starting the engine.
• Engine temperature is still low and
the air flow from the heater is still cold.
- After a few minutes of engine warm up, turn on or set the fan to a higher
level and adjust the temperature
setting to hot.

05
5-111
System Operation
Cooling / Ventilation
1. Select the Face Level
mode.
2. Set the air intake control to fresh 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 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 Floor
& Defrost
mode or press the Front
Defrost mode.
Operation Tips
• To keep dust or unpleasant fumes
from entering the vehicle through the
ventilation system, temporarily set
the air intake control to recirculation
mode. Return the control 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 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. Start the engine.
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 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 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.

Convenience Features
5-112
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.
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 HYUNDAI dealer.

05
5-115
Automatic Heating and Air Conditioning
ODN8059115
1. Press the AUTO button.
The modes, fan speeds, air intake and
air-conditioning will be controlled
automatically according to the
temperature setting you select.
ODN8059239
You can control the wind strength in
three stages by pushing the AUTO button
during automatic operation.
- HIGH : Provide rapid air conditioning and heating with strong wind
- MEDIUM : Provide air conditioning and heating with medium
strength wind
- LOW : It is suitable for drivers who prefer to soft wind.
When you select the temperature to HI
or LO in AUTO mode, the wind strength is
set to ‘HIGH’.
„„Driver’s side „„Passenger’s side
ODN8059116
2. Turn the temperature control knob
to set the desired temperature. If
the temperature is set to the lowest
setting (Lo), the air conditioning
system will operate continuously.
• To turn the automatic operation off, select any button of the following:
- Mode selection button
- Front windshield defroster button
(Press the button one more time to deselect the front windshield
defroster function. The ‘AUTO’ sign
will illuminate on the information
screen once again.)
- Fan speed control toggle switch
The selected function will be controlled manually while other
functions operate automatically.
• For your convenience and improved operating efficiency, use the AUTO
button and set the temperature to 22°C (72 °F).

Convenience Features
5-116
ODN8059214
NOTICE
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 engine.
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 mode position.
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.
When starting the vehicle in cold
weather using manual temperature
control, operate the system in the
following method to improve heating. - Turn off or lower the blower, right after starting the engine.
• Allow the engine to warm up during
this time since the air flow from the
heater is still cold.
- After a few minutes of engine warm up, turn on or set the fan to a higher
level and adjust the temperature
setting to hot.

Convenience Features
5-120
Temperature conversion
If the battery has been discharged or
disconnected, the temperature mode
display will reset to Centigrade.
To change the temperature unit from °C
to °F or °F to °C :
- Automatic climate control system
Press the AUTO button for 3 seconds while pressing the OFF button.
- Instrument cluster
Go to User Settings → Other → Temperature Unit.
The temperature unit on both the cluster
LCD display and the climate control
screen will change.
Air intake control
This is used to select the outside (fresh)
air position or recirculated air position.
To change the air intake control position,
push the control button.
Recirculated air position
With the recirculated air
position selected, air from the
passenger compartment will
be drawn through the heating
system and heated or cooled
according to the function
selected.
Outside (fresh) air position
With the outside (fresh) air
position selected, air enters
the vehicle from outside and
is heated or cooled according
to the function selected.
Information
Using the system primarily in Fresh mode
and Recirculation mode only when needed
is recommended for best results.
Prolonged operation of the heater in
Recirculation mode and without the A/C ON can cause fogging of the windshield.
In addition, prolonged use of the A/C
ON in Recirculation mode may result in
excessively dry, dehumidified air in the cabin.
WARNING
• Continued use of the climate control
system operation in Recirculation
mode for a prolonged period of
time may cause drowsiness to the
occupants in the cabin. This may lead
to loss of vehicle control which may
lead to an accident.
• Continued use of the climate control
system operation in Recirculation
mode with the A/C OFF may allow
humidity to increase inside the
cabin. This may cause condensation
to accumulate on the windshield and
obscure visibility.
• Do not sleep in your vehicle or
remain parked in your vehicle with
the windows up and either the
heater or the air conditioning ON for
prolonged periods of time. Doing so
may increase the levels of carbon
dioxide in the cabin which may lead
to serious injury or death.