As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONT CAB ZONE TEMP LIGHT ON RECALL EXTINGUISHES ON MASTER CAUTION RESET. GROUNDED - YES. PERFORMED BITE PER B737-800 AMM TASK 21-62-00 SHOWS FLIGHT DECK TRIM VALVE ON CONTROLLER. CONT CAB ZONE TEMP/PRIMARY INOP. AIRCRAFT CHECKED AND RELEASED PER MEL 21-21G. (RESOLVED ON W/O: 1014474 TASKCARD: N/R-00002 ) COMPLIED WITH.