Upon arrival system was on cool and thermostat was satisfied at 70, lowered temp to get unit running. Inspecting air handler all components were running in tolerance. Evaporator has a piston installed. I noticed some build up on outside coils of evaporator and wrong size filter was installed. Was asked by home owner to find correct size and advise so they can purchase correct ones. Delta was a 17 from return to supply Moving to outdoor condenser unit, capacitor was in tolerance and contactor was in good condition. Compressor has high inrush amps draw rated for 109 actual was 130. Washed coils from inside out, very little build up on coils. Gauged up and pressures looked good but unit had low superheat. Recommended soft start kit Recommended membership Recommended Evap coil clean Recommended Air quality specialist lead Home owner declined Air quality lead Thermostat was returned to preferred temperature upon departure. Home owner stated they will take time to decide on next steps