As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE "CONT CAB" ZONE TEMP AMBER CAUTION LIGHT ILLUMINATED PERIODICALLY THROUGHOUT DURATION OF FLIGHT. DOES NOT ILLUMINATE ON RECALL. GROUNDED - YES. CYCLED C/B'S AS LISTED IN B737-800 FIM 21-61 TASK 861. PERFORMED BITE CHECK OF CONTROL TEMP CONTROL SYSTEM, WITH NO DISCREPANCIES NOTED. CONTROL CABIN ZONE TEMP OPS CK NORMAL.