What was found
AIR CONDITIONING VERY HOT IN ROWS 6-12, FWD CABIN TEMP CONTROL HAD LITTLE EFFECT. FIRST CLASS AND BACK OF AIRCRAFT COLD. GROUNDED - YES. PERFORMED PACK ZONE TEMP CONTROLLER BITE NR 1 AND NR 2, NO FAULTS FOUND, REF FIM 21-62, TASK 801. PERFORMED CABIN TEMP CONTROLLER INDICATION AND CONTINUITY OPS TEST, REF AMM 21-61-00. FWD CABIN & FLIGHT DECK DIFFICULT TO CONTROL, RUNS HOT. FOUND FWD CABIN & FLIGHT DECK TEMP SENSOR FILTERS VERY DIRTY. CLEANED TEMP SENSORS & FILTERS REF AMM 21-61-06. CABIN TEMP CONTROL OPS CHECKS GOOD FOR ALL ZONES AFTER FILTER CLEANING. NO BITE FAULTS.