What was found
PACK 1 VLV CLSD IN LIGHT. TEMPERATURE IN CABIN TOO LOW IN FLIGHT. AT THE GATE WHILE OPERATING PACK 1&2 VIA APU BLEED, PACK 1 NUMEROUS TIMES STOPPED SUPPLYING AIR AND TURNED OFF. TIRED TEMP CONTROLLERS IN AUTO AND MANUAL MODE WITH SAME RESULTS. NO EICAS MESSAGES PRESENTED-C/A-PERFORMED PACK #1 OPC IAW EMB 140 AMM 21-51-00 OPC GOOD. NO DEFECTS NOTED AT THIS TIME. CND MSG. REMOVED AND REPLACED DUAL TEMP CONTROL VALVE ON PACK #2 IAW EMB 140 AMM 21-60-01. PERFORMED PACK #2 OPC IAW EMB 140 AMM 21-51-00 OPC GOOD. NO DEFECTS NOTED AT THIS TIME. DEFERRED PER MEL 21-30. FOUND JOINT BETWEEN THE CONDENSER/MIXER AND WATER COLLECTOR TORN AND LEAKING ON LH PACK. REMOVED AND REPLACED JOINT ON LH PACK BETWEEN CONDENSER/MIXER AND WATER COLLECTOR AS PER EMB-140 AMM 21-51-03, OPS CHECK AND LEAK CHECK GOOD IAW EMB-140 AMM 21-51-00. MEL ITEM RESTORED.