I am a skilled professional that works for a Alaskan Air Conditioning & Heating - Tucson company. I recently completed a preventer maintenance on a 1-year-old Lennox split system. The maintenance included cleaning the condenser coil, checking the refrigerant pressure, and inspecting the electrical connections. I also replaced the air filter and checked the blower motor and blower wheel for any signs of wear. After the maintenance, the system was running smoothly and efficiently, providing cool air to the home.