What was found
F/A'S REPORT CABIN TEMP EXCESSIVELY WARM DESPITE ATTEMPS TO COOL IN AUTO. MOVED ALL 3 CABIN TEMP CONTROLLERS TO OFF, APPEARED TO RESOLVE CABIN TEMP BUT FLIGHT DECK BECAME QUITE WARM. ACFT GROUNDED. BITE TEST OF BOTH TEMP CONTROLLERS REF AMM FIM 21-61, TASK 801, NO DEFECTS NOTED. COCKPIT ZONE TEMP SENSOR FAILED FLOW CHECK REF AMM FIM 21-61, TASK 861. REPLACED FILTER REF AMM 21-61-06-000-801. BOTH CABIN ZONE TEMP SENSORS FAILED FLOW CHECK REF AMM FIM 21-61T, ASKS 863 & 864. REPLACED BOTH SENSORS FILTERS REF AMM 21-61-06-000-801.