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. LIGHT EXTINGUISHES WHEN MASTER CAUTION LIGHT IS PUSHED. GROUNDED - YES. PERFORMED BOTH LEFT AND RIGHT PACK/ZONE TEMP CONTROLLER BITE IAW FIM 21-62 TASK 801. FOUND NO FAULTS ON LEFT CONTROLLER FOUND FLT DECK TRIM VALVE ON RIGHT CONTROLLER. REMOVED AND REPLACED V143 FLT DECK TRIM VALVE IAW AMM 21-61-21. OPS CKS GOOD IAW FIM 21-62 TASK801. THIS CLEARS MEL 21-21G.