What was found
F/A REPORTS ROWS 13 AND 14 HAVE NO AIR AIRVENTS, OVERHEAD WORKING AND AREA IS WARM. WE MOVED FORWARD CABIN CONTROL TO FULL COLD, SUPPLY DUCT SHOWING 10 DEGREE C. FWD PASSENGER CABIN SHOWING 20 DEGREE C. WE DIDN`T MOVE TRIM AIR TO OFF, IT STAYED ON. DUE TO CABIN JUST WARM AND NOT HOT. ACFT GROUNDED. CLEANED CABIN TEMP SENSOR FILTERS IAW AMM 21-61-06-100-801. RAN APU AND PACKS, HAD SUFFICIENT AIR FLOW FROM GASPERS. SYS OPERATES NORMAL AT THIS TIME.