As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ZONE TEMP CONT CABIN ILLUMINATES ON RECALL EXTINGUISHES WITH RESET. GROUNDED-YES. PERFORMED BITE OF NR 2 PZTC. FOUND FLT DECK TRIM VALVE FAIL. DUE TO PREVIOUS REPLACEMENT OF VALVE, REPLACED PZTC NR 2, REF B737-AMM 21-61-20. PZTC NR 2 OPERATIONS CHECKS GOOD. PERFORMED PZTC NR 2 BITE, REF B737-800 FIM 21-62 TASK 801, NO FAULTS. GROUND VERIFICATION GOOD.