As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON RECALL AFTER START CHECK RECEIVED ZONE TEMP LIGHT ON CONTROLLER CABIN. LIGHT EXTINGUISHES ON MASTER CAUTION RESET. ACFT GROUNDED. PERFORMED ZONE TEMP CONTROLLER BITE CHECK ON NR 1 & 2 CONTROLLER. FOUND FLIGHT DECK TRIM VALVE FAULT ON ZTC 2. CLEARED FAULT, AND COULD NOT DUPLICATE. OPERATED PACK SYS WITH NO FAULTS, RECALL CHECKS NORMAL AMM 21-61-00.