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.
Hyundai Sonata LF 2014-2019 Service Manual: CVVT & Camshaft Description and Operation
Description
Continuous Variable Valve Timing (CVVT) system advances or
retards the valve timing of the intake and exhaust valve in accordance
with the ECM control signal which is calculated by the engine speed and
load.
By controlling CVVT, the valve over-lap or under-lap occurs,
which m ...
Hyundai Sonata LF 2014-2019 Service Manual: Center Pillar Trim Components and Components Location
Component Location
1. Center pillar lower trim2. Center pillar upper trim
...