As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER START CONT CAB ZONE TEMP ILLUMINATED ON RECALL. EXTINGUISHES WITH MASTER CAUTION RESET. GROUNDED-YES. RIGHT PACK/ZONE TEMP CONTROLLER SHOWS FLIGHT DECK TRIM VALVE IN PREVIOUS FLIGHT. ACCOMPLISHED B737-900 FIM 21-62 TASK 832 CONTROL CABIN TRIM VALVE FAULT ISOLATION. NO FAULTS NOTED, GROUND VERIFICATION GOOD.