Hyundai Sonata LF Owner's Manual page 53

Safety system of your vehicle
Rear seat warmers (if equipped)
While the engine is running, push
either of the switches to warm the rear
seat.
During mild weather or under condi-
tions where the operation of the seat
warmer is not needed, keep the
switches in the OFF position.
2-24
Each time you push the switch, the
temperature setting of the seat is
changed as follows :
OFF → HIGH (
The seat warmer defaults to the OFF
position whenever the ignition switch
is placed in the ON position.
i
Information
With the seat warmer switch in the
OLF034028
ON position, the heating system in the
seat turns off or on automatically
depending on the seat temperature.
) → LOW (
)