The temperature will increase by turning the knob to the right.
The temperature will decrease by turning the knob to the left.
Hyundai Sonata LF 2014-2019 Service Manual: CVVT & Camshaft Repair procedures
Removal
1.
Remove the cylinder head cover.
(Refer to Cylinder Head Assembly - "Cylinder Head Cover")
2.
Turn the crankshaft damper pulley so that No. 1 piston is at top dead center.
(1)
Turn the crankshaft damper pulley and align its groove with
the timing mark on the timing chain cove ...
Hyundai Sonata LF 2014-2019 Service Manual: Heated Steering wheel Repair procedures
Inpection
1.
Measure a resistance of NTC and Heated pad.
A.
NTC resistance(Black / Yellow, Black) - 10.0 k? ± 10% (25°C)
B.
Heated pad resistance (Yellow, Black) - 1.6 ~ 2.0 ? ± 10%
2.
Measure a temperature.
A.
The temperature of wheel surface grip must rise from -20°C to 20° ...