What was found
ONE HOUR INTO FLT, FA COMPLAINED CABIN TEMP WAS BECOMING TOO WARM. FWD AND AFT TEMP CONTROLLER WERE ADJUSTED TO COOLER. 1 HOUR LATER THE SAME COMPLAINT. TOO WARM. THIS CYCLE REPEATED ITSELF THROUGHOUT THE 5 30 FLIGHT. TEMP CONTROLLERS BEGAN AT THE 1:00 POSITION AFTER T.O. AND ENDED UP AT THE 10:00 POSITION AT LANDING. ACFT GROUNDEDS. FOUND FWD AND AFT TEMP SENSOR FILTERS VERY DIRTY. CLEANED FILTERS IAW AMM 21-61-06-100-801. BITE TESTED PACK FLOW TEMP CONTROLLERS IAW AMM 21-61-00-740-801-002. NO EXISTING FAULTS.