As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER ENG START, UPON MASTER CAUTION RECALL, ZONE TEMP LGT ILLUMINATED BUT EXTINGUISHED UPON MASTER CAUTION RESET. GROUNDED - YES. HAD FLIGHT DECK TRIM VALVE FAULT. REMOVED AND REPLACED LH FLIGHT DECK TRIM MODULATION VALVE IAW B737-900 AMM 21-61-21-000-801 AND AMM 21-61-21-400-801, ETOPS GROUND FUNCTIONAL CHECK GOOD IAW AMM 21-61-00-700-806-002.