As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ZONE TEMP LIGHT ILLUMINATED ON RECALL FOR CONT CAB ON AIR CONDITIONING PANEL OVERHEAD. GROUNDED - YES. PERFORMED BITE TEST OF ZONE TEMP CONTROLLER #1, CURRENT FAULT SHOWS FLT DECK TRIM VALVE REF B737-800 AMM 21-61-00. RESET CONTROLLER, NO CURRENT FAULTS SHOWN, NO HISTORY 30 DAYS.