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 SINGLE CONTROLLER FAIL LIGHT RESETS WITH MASTER CAUTION RESET. GROUNDED - YES. REMOVED AND REPLACED ZONE TRIM AIR MODULATION VALVE PER AMM 21-61-21/401. ACCOMPLISHED PACK/ZONE TEMPERATURE CONTROLLER BITE PER AMM 21-61-00-700-740-801-002, BITE TEST SUCCESSFUL. GROUND VERIFICATION SUCCESSFUL.