What was found
AT INITIAL LEVEL OFF , FLIGHT ATTENDANT REPORTED EXCESSIVELY WARM OR HOT. PERFORMED QRH AND TEMPERATURES RETURNED TO NORMAL WITH TRIM AIR OFF. ACFT GROUNDED. CLEANED COCKPIT AND FWD CABIN AND AFT CABIN TEMPERATURE SENSOR ASSEMBLY FILTERS IAW AMM 21-61-06-100-801. PERFORMED CABIN TEMP CONTROL & INDICATION OPERATIONAL TEST IAW AMM 21-61-00-700-807-002. OPS CHECKED NORMAL. GOOD FOR CONTINUED SERVICE.