As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONT CAB ZONE TEMP LIGHT ILLUMINATES ON RECALL. RAN QRH AND STILL ILLUMINATES ON RECALL. GROUNDED - YES. CONFIRMED FAULT, CONT CAB LIGHT ILLUMINATES ON RECALL. PERFORMED PZTC BITE REF B737-900 AMM 21-61-00-700-806-002. PZTC #2 FAULTS FLT DECK TRIM VALVE ON BIT AND PREV FLIGHT, RESETS ON VERIFY. AS PRECAUTION DUE TO 1 OTHER OCCURRENCE WITHIN 30 DAYS, REMOVED AND REPLACED FLIGHT DECK TRIM AIR VALVE REF AMM 21-61-21. OP CHECK GOOD. ETOPS GROUND VERIFICATION SUCCESSFUL.