Follow either of these procedures:
Hyundai Sonata LF 2014-2019 Service Manual: Blower Motor Repair procedures
Inspection
1.
Connect the battery voltage and check the blower motor rotation.
2.
If the blower motor does not operate well, substitute with a known-good blower motor and check for proper operation.
3.
Replace the blower motor if it is proved that there is a problem with it.
Replacem ...
Hyundai Sonata LF 2014-2019 Service Manual: SRS Control Module (SRSCM) Repair procedures
Removal
1.
Remove the ignition key from the vehicle.
2.
Disconnect the battery negative cable and wait for at least three minutes before beginning work.
3.
Remove the floor console.
(Refer to Body - "Floor Console Assembly")
4.
Pull up the lock (C), of the SRSCM connector, then disc ...