Push the A/C button to manually turn the system on (indicator light will illuminate) and off.
Hyundai Sonata LF 2014-2019 Owners Manual: Air ventilation seats
The air ventilation seats are provided to cool the front seats by blowing air
through small vent holes on the surface of the seat cushions and seatbacks.
When the operation of the air ventilation seats are not needed, keep the switches
in the OFF position.
While the engine is running, push the sw ...
Hyundai Sonata LF 2014-2019 Service Manual: Air Cleaner Repair procedures
Removal and Installation
1.
Remove the engine cover.
2.
Disconnect the battery negative terminal.
3.
DIsconnect the air duct (A).
4.
Remove the air duct and air cleaner assembly.
Tightening torque
Hose clamp bolt:
2.9 ~ 4.9N.m (0.3 ~ 0.5kgf.m, 2.2 ~ 3.6lb-ft)
Air cleaner ass ...