On arrival blowers running remove some restriction from the filter but good airflow. Ran AC system is low on our 410 A added 1.5 pound. Customer states has happened A few times before. There is construction being done at the house which could compromise the filter. Would recommend joining cool club so that we can come back and check the refrigerant in six months. All operations are normal at this time. Customer does not want a late check out this time.