( TF09E8KG24100000000HAAT02 )
Heater controls, and A/C do not work

Diagnostic procedure
  1. HVAC control power and ground circuit troubleshooting
Also check for
  • Blown fuse No. 10 (7.5 A) in the under-dash fuse/relay box
  • Poor ground at G502
  • Cleanliness and tightness of all terminals