2011 Hyundai Sonata climate control

493
Features of your vehicle
Recirculated air positionWith the recirculated airposition selected, air from
the passenger compart-
ment 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 accord-
ing to the function selected.✽NOTICEProlonged operation of the heater in the
recirculated air position (without air
conditioning selected) may cause fog-
ging of the windshield and side windows
and the air within the passenger com-
partment may become stale.
In addition, prolonged use of the air con-
ditioning with the recirculated air posi-
tion selected will result in excessively dry
air in the passenger compartment.
Fan speed controlThe fan speed can be set to the desired
speed by pushing the fan speed control
button.
The higher the fan speed is, the more air
is delivered.

WARNING
• Continued use of the climate con-
trol system operation in the recir-
culated air position may allow
humidity to increase inside the
vehicle which may fog the glass
and obscure visibility.
• Do not sleep in a vehicle with the air conditioning or heating system
on. It may cause serious harm or
death due to a drop in the oxygen
level and/or body temperature.
• Continued use of the climate con- trol system operation in the recir-
culated air position can cause
drowsiness or sleepiness, and loss
of vehicle control. Set the air intake
control to the outside (fresh) air
position as much as possible while
driving.

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495
Features of your vehicle
WINDSHIELD DEFROSTING AND DEFOGGING
• For maximum defrosting, set the tem-perature control to the extreme
right/hot position and the fan speed
control to the highest speed.
• 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, out-
side rear view mirrors, and all side win-
dows.
• 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.
Manual climate control systemTo defog inside windshield1. Select any fan speed except “0” posi- tion.
2. Select desired temperature.
3. Select the or position.
4. The outside (fresh) air will be selected automatically.
If the outside (fresh) air position is not
selected automatically, press the corre-
sponding button manually.

WARNING
-Windshield heating
Do not use the or position
during cooling operation in
extremely humid weather. The dif-
ference between the temperature of
the outside air and that of the wind-
shield could cause the outer sur-
face 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 knob or button to
a lower speed.

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Features of your vehicle96
4To defrost outside windshield 1. Set the fan speed to the highest
(extreme right) position.
2. Set the temperature to the extreme hot position.
3. Select the position.
4. The outside (fresh) air will be selected automatically.
Automatic climate control systemTo defog inside windshield 1. Select desired fan speed.
2. Select desired temperature.
3. Press the defrost button ( ).
4. The outside (fresh) air position will beselected automatically.
If the outside (fresh) air position is not
selected automatically, adjust the corre-
sponding button manually.
If the position is selected, lower fan
speed is adjusted to a higher fan speed.
To defrost outside windshield 1. Set the fan speed to the highest (extreme right) position.
2. Set the temperature to the extreme hot (HI) position.
3. Press the defrost button ( ).
4. The outside (fresh) air position will be selected automatically.
If the position is selected, lower fan
speed is adjusted to a higher fan speed.

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497
Features of your vehicle
Defogging logicTo reduce the probability of fogging up
the inside of the windshield, the air intake
is controlled automatically according to
certain conditions such as or
position. To cancel or return the defog-
ging logic, perform the following steps.
Manual climate control system1. Turn the ignition switch to the ON posi-tion.
2. Turn the mode selection knob to the defrost position ( ).
3. Push the air intake control button at least 5 times within 3 seconds.
The indicator light in the air intake control
button will blink 3 times with 0.5 second
of interval. It indicates that the defogging
logic is canceled or returned to the pro-
grammed status.
If the battery has been discharged or dis-
connected, the system resets to the pro-
grammed defogging logic.
Automatic climate control system1. Turn the ignition switch to the ON position.
2. Select the defrost position pressing defrost button ( ).
3. While holding the air conditioning but- ton (A/C) pressed, press the air intake
control button at least 5 times within 3
seconds.
The indicator on the air intake control
button blinks 3 times with 0.5 second of
interval. It indicates that the defogging
logic is canceled or returned to the pro-
grammed status.
If the battery has been discharged or dis-
connected, the system resets to the pro-
grammed defogging logic.

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7
Engine compartment / 7-2
Maintenance services / 7-3
Owner maintenance / 7-4
Scheduled maintenance service / 7-6
Explanation of scheduled maintenance items / 7-18
Engine oil / 7-21
Engine coolant / 7-23
Brake fluid / 7-25
Washer fluid / 7-26
Parking brake / 7-27
Air cleaner / 7-28
Climate control air filter / 7-29
Wiper blades / 7-31
Battery / 7-33
Tires and wheels / 7-36
Fuses / 7-49
Light bulbs / 7-58
Appearance care / 7-64
Emission control system / 7-70
California perchlorate notice / 7-73
Maintenance

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77
Maintenance
NORMAL MAINTENANCE SCHEDULEThe following maintenance services must be performed to ensure good emission control and performance. Keep receipts for all
vehicle emission services to protect your warranty. Where both mileage and time are shown, the frequency of service is deter-
mined by whichever occurs first.
15,000 miles (24,000 km) or 12 months
❑Inspect air cleaner filter❑Inspect vacuum hose❑Inspect air conditioning refrigerant❑Inspect brake hoses and lines❑Inspect drive shafts and boots❑Inspect electronic throttle control❑Inspect exhaust pipe and muffler❑Inspect front disc brake/pads, calipers and rotors❑Inspect steering gear box, linkage & boots/lower arm ball joint,
upper arm ball joint❑ Inspect suspension mounting bolts❑Replace climate control air filter (for evaporator and blower unit)❑Replace engine oil and filter
(15,000 miles (24,000 km) or 24 months)
22,500 miles (36,000 km) or 18 months
❑ Inspect air cleaner filter❑Inspect vacuum hose❑Replace engine oil and filter
(22,500 miles (36,000 km) or 36 months)
7,500 miles (12,000 km) or 6 months
❑ Inspect air cleaner filter❑Inspect vacuum hose❑Replace engine oil and filter
(7,500 miles (12,000 km) or 12 months)

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Maintenance8
7NORMAL MAINTENANCE SCHEDULE (CONT.)
37,500 miles (60,000 km) or 30 months
❑ Inspect air cleaner filter❑Inspect vacuum hose❑Inspect manual transaxle fluid (if equipped)❑Replace engine oil and filter
(37,500 miles (60,000 km) or 60 months)*1: Fuel filter & Fuel tank air filter are considered to be maintenance free\
but peri-
odic inspection is recommended for this maintenance schedule depends on
fuel quality. If there are some important safety matters like fuel flow restric-
tion, surging, loss of power, hard starting problem etc, replace the fuel filter
immediately regardless of maintenance schedule and consult an authorized
HYUNDAI dealer for details.
30,000 miles (48,000 km) or 24 months
❑ Inspect vacuum hose❑Inspect air conditioning refrigerant❑Inspect brake hoses and lines❑Inspect drive shafts and boots❑Inspect electronic throttle control❑Inspect exhaust pipe and muffler❑Inspect front disc brake/pads, calipers and rotors❑Inspect steering gear box, linkage & boots/lower arm ball joint,
upper arm ball joint❑Inspect suspension mounting bolts❑Inspect brake/clutch (if equipped) fluid ❑Inspect crankcase ventilation hose❑Inspect fuel filter *
1
❑Inspect fuel lines, fuel hoses and connections❑Inspect fuel tank air filter (if equipped) *
1
❑Inspect rear disc brake/pads, parking brake❑Inspect vapor hose and fuel filler cap❑ Replace climate control air filter (for evaporator and blower unit)❑Replace air cleaner filter❑Replace engine oil and filter
(30,000 miles (48,000 km) or 48 months)

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79
Maintenance
45,000 miles (72,000 km) or 36 months
❑Inspect air cleaner filter❑Inspect vacuum hose❑Inspect air conditioning refrigerant❑Inspect brake hoses and lines❑Inspect drive shafts and boots❑Inspect electronic throttle control❑Inspect exhaust pipe and muffler❑Inspect front disc brake/pads, calipers and rotors❑Inspect steering gear box, linkage & boots/lower arm ball joint,
upper arm ball joint❑ Inspect suspension mounting bolts❑Replace climate control air filter (for evaporator and blower unit)❑Replace engine oil and filter
(45,000 miles (72,000 km) or 72 months)NORMAL MAINTENANCE SCHEDULE (CONT.)
52,500 miles (84,000 km) or 42 months
❑ Inspect air cleaner filter❑Inspect vacuum hose❑Replace engine oil and filter
(52,500 miles (84,000 km) or 84 months)

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