2005 Hyundai Sonata Owner's Manual - Page 122

FEATURES OF YOUR HYUNDAI 1 109 With the "Fresh" mode selected, air enters the vehicle from the outside and is heated or cooled according to the function selected. With the "Recirculation" mode selected, air from within the passenger compartment will be drawn through the heating system and heated or cooled according to the function selected. B980C03Y-GAT Air Intake Control Switch (With A.Q.S) (If Installed) Recirculation mode : Air from witin the passenger compartment will be drawn through the heating system and heated or cooled according to the function selected. Exhaust gas cutoff mode : Air enters the vehicle from the outside. But if exhaust gas enters the vehicle from the outside, the exhaust gas cutoff mode ( ) is automatically converted to the ( ) mode, to prevent exhaust gas from entering the vehicle. NOTE: o It should be noted that prolonged operation of the heating system in "recirculation" mode will give rise to fogging of the windshield and side windows and the air within the passenger compartment will become stale. In addition, prolonged use of the air conditioning with the "Recirculation" mode selected may result in the air within the passenger compartment becoming excessively dry. o When the ignition switch is turned "ON" the air intake control will change to " " mode (regardless of switch position). This is normal operation. The air intake control operates in "AUTO" mode when turning the ignition to the ON position if the "AUTO" mode was used before shutting off the engine. NOTE: o It should be noted that prolonged operation of the heating system in recirculation mode ( ) will give rise to misting of the windshield and side windows and the air within the passenger compartment will become stale. In addition, prolonged use of the air conditioning with the recirculation mode ( ) sele-cted may result in the air within the passenger compartment becoming excessively dry. o When the ignition switch is turned "ON", the air intake control will change to "Fresh" mode (regardless of switch position). This is normal operation. The air intake control operates in "AUTO" mode when turning the ignition to the ON position if the "AUTO" mode was used before shutting off the engine. HNF2139-1 This is used to select fresh outside air or recirculate inside air automatically. : : OFF ON Fresh mode : Air enters the vehicle from the outside and is heated or cooled according to the function selected.