What was found
ON RECALL CONT CABIN ZONE TEMP LIGHT. EXTINGUISHES WITH RESET. GROUNDED - YES. VERIFIED FAULT, ACCOMP PACK TEMP CONT BITE #1 NO FAULTS. CONT #2 FAULTS FLT DECK TRIM VALVE. CLEARED FAULT. RAN PACKS FOR 20 MIN & ACCOMP CABIN TEMP SELECTOR TEST, TEST PASS. CLEANED ALL 3 TEMP SENSOR FILTERS. REACCOMP. PACK TEMP CONT BITE, TEST PASS NO FAULTS. REF. B737-900 FIM 21-62 TASK 801 & B737-900 AMM 21-61-07-840-006-002 & AMM 21-61-06-400-801.