Arrived at customer's house for unit not cooling well. On arrival unit was putting put 73° air. House was at 80 unit was set to 65. 2 heads weren't making cool 2 closest were. Talked to Wilson and he instructed me to add gas. Added about 7 lbs of freon. Unit now producing 59° air. Back bedroom producing 54° air. Need to return to perform leak check. Collected signatures and left. Customer happy.