Performed a one system maintenance checking cooling. Checked indoor units mechanical and electrical components, checked drains, filter duct work. Noticed that the system didnâ€™t have any float switches to stop unit if drain pan get full. Checked outdoor units pressureâ€™s amp draws and capacitor all looked good. Recommended adding a surge protector to the outdoor unit since inside already has one and a start assist for the compressor to reduce wear and tear on compressor.