As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT DECK PRIMARY TEMP CONTROL INOP. GROUNDED - YES. ACCOMPLISHED `PZTC BITE TEST REF B737-900 AMM 21-61-00-700-806-002. LAST FLIGHT LEG HISTORY SHOWED FAULT FOR FLT DECK TRIM VALVE. PREV FLT LEG HISTORY SHOWED NO FAULTS. NO FAULTS SHOWED UPON VERIFICATION.