As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB OUT, CONTROL CABN ZONE TEMP ILLUMINATED BUT EXTINGUISHED WITH MASTER CAUTION RESET. PERFORMED QRH ITEMS TO POINT WHETHER IT STATES, "NO FURTHER ACTION REQUIRED". ACFT GROUNDED. REPLACED THE CONTROL CABIN TRIM VALVE (V143) IAW AMM TASK 21-61-21-400-801. OPS GOOD IAW AMM 21-61-21-860-010.