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 ILLUMINATED ON MASTER CAUTION CHECK. CANCELLED ON RESET. ACFT GROUNDED. PERFORMED CABIN TEMP CONTROLLER BITE PROCEDURE. CLEARED FLIGHT DECK TRIM VALVE FAULT. RAN PACK, FAULT DID NOT RETURN IAW AMM 21-61-00. RECALL CHECKED GOOD.