As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONTROL CABIN ZONE TEMP. LIGHT COMES ON DURING RECALL AND RESETS AFTER MASTER CAUTION RESET. ACFT GROUNDED. ACCOMPLISHED PACK/ZONE TEMP CONTROLLER BITE, REF FIM 21-62, TASK 801. FOUND FAULT ON FLIGHT DECK TRIM VALVE NR 2 CONTROLLER. FAULT RESET, INTERMITTENT FAULT.