As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAXI AFTER MASTER CAUTION RECALL RECEIVED A ZONE TEMP LIGHT ON THE CONT CABIN CONTROLLER. ACFT GROUNDED. NR 1 & 2 PACK/ZONE TEMP CONTROLLER BITE SHOWS HARD FAIL FLIGHT DECK TCV (V143). REMOVED & REPLACED TCV IAW AMM 21-61-21, GROUND FUNCTIONAL CK & LEAK CHECKED NORMAL IAW AMM 21-61-00-700-806-002.