To defog inside windshield

1. Set the fan speed to the desired position.
2. Select the desired temperature.
3. Press the defrost button (
).
4. The outside (fresh) air will be selected automatically. If the
position is selected, air conditioning
will also be selected automatically.
If the air conditioning and/or outside (fresh) air position are not selected automatically, press the corresponding button manually.
To defrost outside windshield

1. Set the fan speed to the highest position.
2. Set the temperature to the highest temperature setting (clockwise).
3. Press the defrost button (
).
4. The outside (fresh) air and air conditioning will be selected automatically.
Windshield defrosting and defogging
Automatic climate control systemHyundai Tucson (LM) 2010-2015 Service Manual: 4WD ECU Components and Components Location
Components Location
1. 4WD ECU
...
Hyundai Tucson (LM) 2010-2015 Service Manual: Body Control Module (BCM) Description and Operation
Body Control Module (BCM) Funtionsscription
FunctionDescriptionFRONT WASHER LINKED WIPERx With IGN2 ON, turning ON the WasherSW turns ON the Wiper
and turning OFF the WasherSW keeps Wiper output for 2.5~3.8 seconds then
turns OFF.INT WIPERx With IGN2 ON, turning ON the FRWiperIntSW operates ...