The blower and the heater controls and the A/C system do not work(Heating/Air Conditioning)

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