As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ZONE TEMP LIGHT ON CONTROL CABIN ILLUMINATED ON RECALL. GROUNDED-YES. VERIFIED NO CURRENT FAULT. HISTORY SHOWS FLT DECK TRIM VALVE FAULT CLEARED. CW B737-800 FIM 21-62 TASK 833 AND 21-61 TASK 861 FOR AUTO TEMP CONTROL. NO CONT CAB ZONE TEMP ON RECALL. INTERMITTENT FAULT.