As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MASTER RECALL, "ZONE TEMP" LIGHT ILLUMINATED ON OVERHEAD PANEL, AT CONTROLLER CABIN LIGHT EXTINGUISHED WITH MASTER CAUTION RESET. AIR CONDITION SYS OPERATES NORMAL. ACFT GROUNDED. ACCOMPLISHED ZONE TEMP CONTROLLER BITE IAW FIM 21-62-801, NR 2 CONTROLLER SHOWED "FLT DECK TRIM VALVE" FAULT. RESET FAULT, RAN TEST AGAIN = NO FAULT. NO HISTORY 90 DAYS. ETOPS SIGNIFICANT SYS GROUND VERIFICATION SUCCESSFUL.