Preformed a winter maintenance on a Ruud heat pump. Indoor unit:I checked amps on blower motor and heat strips, I checked coils, I checked drain pan and drain line, I checked float switch, I checked Uv light, I checked electrical wires and connections. Outdoor unit: I checked amps on compressor and fan motor, I checked capacitor, I checked around the contactors and the board, I looked into the unit for rubbed wires and rust, I vacuumed the drain line and washed the unit down with water. Everything is working properly at this point in time.