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. 5. Tested compressor/ condenser fan motor capacitor,,, recommended a surge protector for the outdoor unit to prevent over current. 6. Checked refrigerant pressures. 7. Checked compressor amp draw. 8. Checked condenser fan motor amp draw. 9. Inspected / replaced return filter. 10. Inspected return plenum for debris/ dirty,,,,all supply vents/ return are very dusty highly recommended a duct cleaning. 11. Inspected evaporator coil. 12. Inspected blower motor/ blower wheel. 13. Checked blower amp draw. 14. Measured temperature differential . 15. Inspected drain lines. 16. Washed condenser unit.