As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN "RECALL" IS SELECTED "ZONE TEMP" IS ANNUNCIATED ON THE OVERHEAD PANEL. QRH PROCEDURE WAS FOLLOWED THE TEMP DID NOT INCREASE WHEN THE MASTER CAUTION WAS SELECTED. ALL WAS RESET UNTIL "RECALL" WAS RE-SELECTED DUCT TEMP DID NOT INCREASE DURING THIS PROCESS. NR 2 TEMP CONTROLLER SHOWS FLT DECK TRIM VALVE FAULT. REPLACED FLT DECK TRIM AIR VALVE P/N 398908 3 S/N 1603. GROUND VERIFICATION SUCCESSFUL.