Performed a 1 system spring maintenance ( gas). Tasks performed. 1. Visually inspected condenser coil for debris/ dirty. 2. Inspected condenser fan motor. 3. Inspected condenser fan blades. 4. Inspected/ cleaned wiring connections,,,noticed both units don’t have over current protection, recommended surge protectors. 5. Tested compressor/ condenser fan motor capacitor. 6. Checked refrigerant pressures,,,upstairs unit had abnormal refrigerant pressures ( low suction pressures/high pressure),, after temperature differential readings and return filter replacement we found the unit doing 19 degrees split differential, homeowner is aware of it, unit is from 2015,, we didn’t notice any refrigerant leak at this point,, suggested to monitor the unit and keep us updated,, 7. Checked compressor amp draw. 8. Checked condenser fan motor amp draw. 9. Inspected / replaced return filter. 10. Inspected return plenum for debris/ dirty. 11. Inspected evaporator coil. 12. Inspected blower motor/ blower