Performed a 2 ( commercial)system spring maintenance ( ac/electric heat ). 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. Checked refrigerant pressures. 6. Checked compressor amp draw. 7. Checked condenser fan motor amp draw. 8. Inspected / replaced return filter,,, filters on #2 unit are dirty, they need to be replaced. 9. Inspected return plenum for debris/ dirty. 10. Inspected evaporator coil. 11. Inspected blower motor/ blower wheel/belts,,,, belt on #2 unit is damaged and blower motor is shaking, belt needs to be replaced and the motor needs to be adjusted. 12. Checked blower amp draw. 13. Measured temperature differential . 14. Inspected drain lines,,there are no drain lines ,,drain lines were capped,, they need a drain line to drain condensation water properly.