System Operation
Ventilation
1. Select the face level
mode.
2. Set the air intake control to the outside (fresh) air position.
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 the outside (fresh) air position.
3. Set the temperature control to the desired position.
4. Set the fan speed control to the desired speed.
5. If dehumidified heating is required, turn on the air conditioning system.
If the windshield fogs up, select the floor and defrost modes.
mode or press the Front Defrost button.
mode.
Operating Tips
- To prevent dust or unpleasant odors from entering the vehicle through the ventilation system, temporarily set the air intake control to the recirculation position. Return the control to the fresh air position when the irritant has cleared. This helps the driver stay alert and comfortable.
- To prevent the inside of the windshield from fogging up, set the air intake control to the fresh air position, set the fan speed to the desired position, turn on the air conditioning system, and adjust the temperature control to the desired temperature.
Air Conditioning
All HYUNDAI air conditioning systems are filled with environmentally friendly R-1234yf refrigerant.
1. Start the engine.
2. Press the air conditioner button.
3. Set the mode to the face level position.
mode.
4. Set the air intake control to the recirculation position. However, prolonged operation in recirculation mode will excessively dry the air. In this case, change the air intake position.
5. Adjust the fan speed and temperature for maximum comfort.
If maximum cooling is required, set the temperature control to the extreme left position, then set the fan speed control to maximum speed.
NOTICE
When using the air conditioning system, monitor the engine temperature gauge. Be especially careful when driving uphill or in heavy traffic when the outside air temperature is high. Operating the air conditioning system may cause the engine to overheat. Continue to use the blower, but turn off the air conditioning system if the engine temperature gauge indicates engine overheating.
- If the vehicle has been parked in direct sunlight in hot weather, open the windows briefly to release the hot air from the vehicle interior.
- After sufficient cooling has been achieved, switch the air intake control from recirculation back to fresh outside air.
- To reduce humidity inside the windows on rainy or humid days, reduce the humidity inside the vehicle by operating the air conditioning system with the windows and sunroof closed.
- Operate the air conditioning system for only a few minutes each month to maintain maximum system performance.
- If the air conditioner is operated excessively, the difference between the outside air temperature and the windshield temperature may cause the outer surface of the windshield to fog up, resulting in reduced visibility. In this case, set the mode selector knob or button to
position and reduce the fan speed to a lower setting.
Test yourself
A quick Hyundai Sonata LF quiz: every answer comes with an explanation and a link to the manual page.