The blower and the heater controls and the A/C system do not work
Diagnostic Procedure
Probable cause: HVAC control unit malfunction

Do the HVAC control power and ground circuit troubleshooting
Also Check for
HVAC DTCs
Blown fuse No. B22 (7.5 A) in the under-dash fuse/relay box
Poor ground at G502
Poor or loose connections at the terminals