Preformed a maintenance on a Ruud unit. Indoor unit: I checked amps on the blower motor, I checked the capacitor, I checked the float switch, I checked the coils, I checked the drain pan and drain line, I checked the electrical wires and connections, I checked the heating element. Outdoor unit: I checked amps on the compressor and fan motor, I checked around the contactors and the board, I checked the capacitor, I looked into the unit for rubbed wires and rust, I vacuumed the drain line and I vacuumed the bottom of the unit, I checked behind the disconnect, I washed the unit down with water, the only thing I noticed was that the disconnect and the unit had a light amount of spider webs, for the indoor unit I noticed the coil, had a light/medium amount of rust.