As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CONT CAB ZONE TEMP ILLUMINATED DURING RECALL CHECK. LIGHT EXTINGUISHED AFTER MC RESET. GROUNDED - YES. INITIAL EVALUATION, CONT CAB ZONE TEMP ON MASTER RECALL AT OVERHEAD. PERFORMED PZTC IAW B737-800 FIM 21-62 TASK 801. #2 CONTROLLER HAD FLT DECK TRIM VALVE ON BIT, CLEARED GREEN ON VERIFY. PER FIM 21-62 TASK 833, NO FUTHER ACTION REQUIRED.