
The mode selection button controls the direction of the air flow through the ventilation system.
The air flow outlet port is converted as follows:

Face-Level (B, D)

Air flow is directed toward the upper body and face. Additionally, each outlet can be controlled to direct the air discharged from the outlet.
Bi-Level (B, D, E, C)

Air flow is directed towards the face and the floor.
Floor-Level (C, A, D, E)

Most of the air flow is directed to the floor, with a small amount of the air being directed to the windshield and side window defrosters.
Floor/Defrost-Level (A, C, D, E)

Most of the air flow is directed to the floor and the windshield with a small amount directed to the side window defrosters.

Defrost-Level (A, D)
Most of the air flow is directed to the windshield with a small amount of air directed to the side window defrosters.

Instrument panel vents
The outlet vents can be opened or closed separately using the horizontal thumbwheel. To close the vent, rotate it left to the maximum position.
To open the vent, rotate it right to the desired position.
Also, you can adjust the direction of air delivery from these vents using the vent control lever as shown.
Manual heating and air conditioning
Temperature controlHyundai Tucson (LM) 2010-2015 Service Manual: Description and Operation
Description
The Evaporative Emission Control System prevents fuel vapor
stored in fuel tank from vaporizing into the atmosphere. When the fuel
evaporates in the fuel tank, the vapor passes through vent hoses or
tubes to a canister filled with charcoal.
The canister temporarily holds the v ...
Hyundai Tucson (LM) 2010-2015 Service Manual: Special Service Tools
Special Service Tools
Tool(Number and Name)Illustration Use09495-3K000Band installerInstallation of ear type boot band09495-33000PullerRemoval of spider assembly from a drive shaft.09530-2W100Differential side oil seal installerInstallation of the differential side oil seal.(Use with 09231-H110 ...