As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ZONE TEMP CONT CAB LT AFTER START. GROUNDED - YES. PERFORMED CABIN TEMP CONTROLLER BITE CHECK REF B737-900 AMM 21-61-00-700-806-002 FOUND FAULT MSG FOR (FLT DECK TRIM VALVE) ON CONTROLLER #2 , CLEARS AFTER RESET CURRENTLY NO ACTIVE FAULTS.