What was found
CLIMBING THROUGH APPROXIMATELY 14000 PACK LIGHT ILLUMINATED, HOWEVER NO MASTER CAUTION OR ANNUNCIATOR ILLUMINATED. GROUNDED-YES. PERFORMED PACK/ZONE TEMPERATURE CONTROLLER BITE TEST, PER B737-900 AMM TASK 21-61-00-700-806-002. FOUND LEFT HAND TCV FAULTED. REMOVED AND REPLACED TEMP CONTROL VALVE, PER AMM 21-51-10/401. RAN BITE TEST AGAIN, NO FAULTS NOTED AT THIS TIME. PERFORMED LIGHT TEST ON MASTER CAUTION AND ANNUNCATOR PANEL, PER AMM 21-51-65. NO FAULTS AT THIS TIME. OPERATIONS CHECK IS GOOD.