As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON RECALL, MASTER CAUTION AIR CONDITIONING AND CONTROL CABIN ZONE TEMP LIGHTS ILLUMINATE. ALL LIGHTS EXTINGUISH UPON PUSHING MASTER CAUTION RESET. ACFT GROUNDED. PERFORMED FIM TASK 21-62-00-810-833 CONTROL CABIN TRIM AIR VALVE (BACKUP) FAULT ISOLATION, LOGGED A FLIGHT DECK TRIM AIR VALVE ON CONTROLLER NR 2, RESET FAULT. GROUND VERIFICATION TESTS NORMAL.