Preformed a winter maintenance on 2 Lennox heat pumps. Indoor units: I checked amps on the blower motors and heat strips, I checked the Uv lights, I checked the coils, I checked the drain pans and drain lines, I checked the electrical wires and connections, I checked behind the disconnects, I checked the float switches, I checked temperature. The only thing I noticed was the low voltage wires were losing there insulation due to the Uv light, I wrapped the wires up with electrical tape and move the Uv light to a more appropriate place. Outdoor units: I checked amps on the compressors and fan motors, I checked around the contactors and the boards, I checked the electrical wires and connections, I checked the capacitors, I looked into the units for rubbed wires and rust, I vacuumed the drain lines and around the units, I washed the units down with water.