Completed maintenance on 2 central a/c systems unico air handler for the 2nd floor, space pak for the 1st floor and 3 daikin ductless heads with one condenser. Customer said that the 2nd floor system is running longer than usual found slight frosting on the evaporator coil for the 2nd fl this was due to the air filter being very dirty causing the system to work harder. Chemically cleaned all evaporator coil’s. Inspected blower compartment and primary drain pan. Treated and cleared all drain lines,traps and tested all condensate pumps. Brushed and cleaned all electrical cabinets and tighten and secured all electrical connections on both inside and outdoor units. Tested all safety switches all in working condition. The 1st floor system was very dusty unit was vacuumed. All air filters were replaced 14x24x1, 14x20x1 and all washable filters were washed Chemically cleaned all outdoor condenser’s checked operations and refrigerant pressures. Tested all electrical voltage, capacitors, a