As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
F/A REPORTED HOT IN CABIN ROW 6 TO ROW 15. REST OF CABIN COMFORTABLE BOTH FORE AND AFT. BITE CHECKED BOTH ZONE TEMP CONTROLLERS REF FIM 21-62, TASK 801. NO FAULTS. FOUND FWD CABIN TEMP SENSOR FILTER CLOGGED. CLEANED IAW MM 21-61-06. VERIFIED FWD CABIN DUCT TEMP DECREASED & INCREASED WITH TEMP CONTROL KNOB POSITION. ETOPS GROUND VERIFICATION TEST SUCCESSFUL.