As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONT CAB ZONE TEMP LIGHT ILLUMINATES ON RECALL. EXT WITH A MASTER RESET. T/S FOUND NR 2 ZONE TEMP CONTROLLER WITH "FLT DECK PRIMARY TCV" FAULT LAST FLIGHT. PERFORMED PACK/ ZONE TEMP CONTROLLER BITE TEST REF AMM 21 61 00 700 806 002 2 STEPS E (1) F(2). OPS TEST GOOD.