1. Start the engine.
2. Set the mode to the desired position. To improve the effectiveness of heating
and cooling : - Heating:
- Cooling:

3. Set the temperature control to the desired position.
4. Set the air intake control to the outside (fresh) air or recirculated air position.
5. Set the fan speed control to the desired speed.
6. If air conditioning is desired, turn the air conditioning system on.


The mode selection knob controls the direction of the air flow through the ventilation system.
Air can be directed to the floor, dashboard outlets, or windshield. Five symbols are used to represent Face, Bi-Level, Floor, Floor-Defrost and Defrost air position.
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, C, E)

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

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

Most of the air flow is directed to the windshield with a small amount of air directed to the side vents.

The MAX A/C mode is used to cool the inside of the vehicle faster. Air flow is directed toward the upper body and face.
In this mode, the air conditioning and the recirculated air position cannot be selected. Turn the fan speed mode to adjust.

The instrument panel vent air flow can be directed up/down or left/right using the vent adjustment lever.
The air flow can also be closed using the vent adjustment lever. To close the instrument panel vents, slide the vent adjustment lever to the LEFT until it clicks.

The temperature will increase by turning the knob to the right.
The temperature will decrease by turning the knob to the left.

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
Fan speed control

Turn the knob to the right to increase the fan speed and airflow. Turn the knob to the left to decrease fan speed and airflow.
Setting the fan speed control knob to the "0" position turns off the fan.
Air conditioning

Press the A/C button to turn the system on (indicator light will illuminate) and off.
Manual Climate Control SystemHyundai Elantra AD (2016-2020) Service Manual: Cylinder Head Repair procedures
Removal
Engine removal is not required for this procedure.
•
Use fender covers to avoid damaging painted surfaces.
•
To avoid damaging the cylinder head, wait until the engine
coolant temperature drops below normal temperature (20°C [68°F]) before
removin ...
Hyundai Elantra AD (2016-2020) Service Manual: Inhibitor Switch Description and Operation
Description
•
The inhibitor switch mounted on the upper of transaxle and connected with shifter lever.
•
The inhibitor switch has four points of contact and it makes the signals(S1, S2, S3, S4).
•
The inhibitor switch signals delivered at the TCM according
to control of t ...