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 ILLUMINATED ON RECALL CLEARS WITH MASTER CAUTION RESET. GROUNDED - YES. PERFORMED PZTC BITE REF B737-800 TASK 21-61-00-700-808-001. FOUND FLT DECK TRIM VALVE FAULT LOGGED ON #2 PZTC. CLEARED FAULT. RAN LEFT AND RT PACKS FOR HALF HOUR. NO FAULTS LOGGED.