As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONTROLLER CABIN ZONE TEMP LIGHT ILLUMINATED UPON DEPARTURE-LIGHT WENT OUT WHEN MASTER CAUTION WAS RESET. ACFT GROUNDED. ACCOMPLISHED PACK/ZONE TEMP CONTROLLER BITE TEST IAW MM 21-61-00-700-806-002. NR 2 TEMP CONTROLLER LOGGED FLT DECK TRIM VALVE. REPLACED FLT DECK TRIM VALVE IAW MM 21-61-21. VALVE OPS CHECKS, LEAK CHECKS GOOD. NO FAULTS LOGGED ON NR 2 TEMP CONT.