As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING MASTER CAUTION CHECK CONTROLLER CAB ZONE TEMP LIGHT ILLUMINATED. EXTINGUISHES ON MASTER CAUTION RESET. ACFT GROUNDED. ACCOMPLISHED FIM 21-61, TASK 861, CONTROL CABIN AUTO TEMPERATURE CONTROL DOES NOT OPERATE FAULT ISOLATION. NO CURRENT FAULTS, GROUND VERIFICATION TESTS GOOD.