This button is used to select the outside (fresh) air position or recirculated air position.
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
Prolonged use of the air conditioning with the recirculated air position selected will result in excessively dry air in the passenger compartment.
WARNING
Hyundai Sonata LF 2014-2019 Service Manual: Audio Unit Components and Components Location
Components
Connector Pin Information
NoConnector AConnector B1Rear left speaker (+)CAN High2Front left speaker (+)-3Front right speaker (+)-4Rear right speaker (+)Steering wheel remote5--6-USB D (+)7-USB VDD8Illumination (+)AUX R IN9DetentAUX GND10Rear left speaker (-)Mic (+) B/T11Front left spe ...
Hyundai Sonata LF 2014-2019 Owners Manual: Additional Safety Precautions
Passengers should not move out of or change seats while the vehicle is moving.
A passenger who is not wearing a seat belt during a crash or emergency stop can
be thrown against the inside of the vehicle, against other occupants, or be ejected
from the vehicle.
Do not use any accessories on seat b ...