
To defog inside windshield
1. Select any fan speed except “0” position.
2. Select desired temperature.
3. Select the
or
position.
4. The outside (fresh) air will be selected automatically. Additionally, the
air conditioning will automatically operate if the mode is selected to the
position.
If the air conditioning and 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 (extreme right) position.
2. Set the temperature to the extreme hot position.
3. Select the
position.
4. The outside (fresh) air and air conditioning will be selected automatically.
Windshield Defrosting and Defogging
Automatic Climate Control SystemHyundai Elantra AD (2016-2020) Service Manual: Curtain Airbag (CAB) Module Repair procedures
Removal
1.
Disconnect the battery negative cable and wait for at least 3 minutes before beginning work.
2.
Remove the roof trim.
(Refer to Body - "Roof Trim Assembly")
3.
Remove the curtain airbag (A) after disconnecting the curtain airbag harness connector (B) and loosening the mounti ...
Hyundai Elantra AD (2016-2020) Service Manual: Heater & A/C Control Unit (Manual) Repair procedures
Replacement
1.
Disconnect the negative (-) battery terminal.
2.
Remove the glove box upper cover assembly.
(Refer to Body - "Glove Box Upper Cover Assembly")
3.
Loosen the mounting screws and remove the crash pad center lower cover [LH](A).
4.
After loosening the mounting screws, r ...