As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER ENGINE START CONT CAB ZONE TEMP ILLUMINATES ON RECALL EXTINGUISHES WITH MASTER CAUTION RESET. GROUNDED - YES. PERFORMED BITE TEST ON BOTH ZONE TEMP COT PER B737-800 FIM 21-61 TASK 801 FOUND TRIM VALVE FLT DECK FAULT ON CONT #2, CLEARED TRIM VALVE FLT DECK FAULT ON #2 CONTROLLER.