As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ZONE TEMP LIGHT ILLUMINATES ON RECALL FOR CONT CAB EXTINGUISHES WITH MASTER CAUTION RESET. GROUNDED - YES. TROUBLESHOT PER B737-800 FIM 21-62 TASK 842. FOUND FLT DECK TRIM VALVE FAULT LIGHT ON #2 PACK/ZONE TEMPERATURE CONTROLLER ILLUMINATED. TROUBLESHOT PER FIM 21-62 TASK 832 CONTROL CABIN TRIM AIR VALVE FAULT ISOLATION. REMOVED AND REPLACED CONTROL CABIN TAV (V143) PER B737-800 AMM 21-61-21. OPS CHECK AND LEAK CHECK GOOD. ETOPS GROUND VERIFICATION SUCCESSFUL.