As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONTROL CAB ZONE TEMP ILLUMINATES ON RECALL. EXTINGUISHERS ON RESET. GROUNDED - YES. RELEASED PER MEL 21-21G FLT DECK PRIMARY TEMP CONTROL INOP. REF B737-800 FIM 21-61-00. TEMP CONTROLLER SHOWS NO FAULTS. REF B737-800 AMM 21-61-06-100-801. CLEANED CONTROL CABIN TEMP FILTER.