As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MASTER CAUTOIN RECALL CONT CABIN ZONE TEMP LIGHT ILLUMINATES CONTROL CABIN ZONE TEMP LIGHT EXTINGUISHED WITH MASTER CAUTION RESET. GROUNDED - YES. REMOVED AND REPLACED THE FLIGHT DECK TRIM VALVE GROUND VERIFICATION PASS REF B737-800 AMM 21-62-21-000/400-801.