Upon arrival systems were satisfied at 74° Home owner provided filters to change out and vinegar to test drain lines Replaced both filters After dropping temperature on thermostats to keep them operating I went into attic and started inspecting both units I started with the upstairs unit checked delta and had 18° of cooling I then checked electrical components all were good Checked blower motor and motor capacitor, blower in good condition and capacitor in tolerance Checked Evap coil and it is clean and in good condition Tested drain line with vinegar and chased with 1 gallon of water as both units primary lines are connected Moved to downstairs unit and also had an 18° delta Electrical components were good and blower motor was good Motor capacitor was in tolerance Evap coil clean and in good condition Drain line was clear and no backups after vinegar and 1 gallon of water Moved to outdoor units and started by checking capacitors both unit's capacitors were in tolerance Relocated fans