As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON RECALL, MASTER CONTROLLER ILLUMINATED. CONTROLLER CAB ZONE TEMP. ACFT GROUNDED. BITE CHECKED BOTH TEMP CONTROLLERS, REF FIM 21-62, TASK 801. PREVIOUS FLIGHT, BOTH FAULTED FLIGHT DECK SENSOR. FAULTS CLEARED. RAN VERIFY TEST 3 TIMES WITH NO FAULTS NOTED.