As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ZONE TEMP CONT CAB LIGHT ILLUMINATES ON MASTER CAUTION RECALL AND EXTINGUISHES ON MASTER CAUTION RESET. ACFT GROUNDED. ZONE TEMP CONT 2 BITE FAILS FLIGHT DECK TRIM VALVE. OPERATED FLIGHT DECK TEMPERATURE CONTROL, BITE CHECK TRIM AIR VALVE AND CABIN TEMP CONTROLLER. OPERATED NORMAL, NO DEFECT NOTED. WAS AN INTERMITTENT FAULT, IAW AMM TASK 21-62-00 AND FIM 21-62 TASK 832.