As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONTROL CABIN ZONE TEMP ILLUMINATES ON RECALL, EXTINGUISHES ON RESET. ACFT GROUNDED. RIGHT PZTC LOGGED FLIGHT DECK TRIM VALVE. RESET RIGHT PZTC. CLEANED FLIGHT DECK TEMP SENSOR FILTER, REF AMM 21-61-06-201. RAN PACK FOR 45 MINUTES AT VARIOUS SELECTED TEMPERATURES. VERIFIED VALVE PASSED WITH SEVERAL BITE CHECKS, REF AMM TASK 21-61-00-700-806-002.