Performed preventative maintenance for a Lennox system. Checked drain pan and drain line for any possible clogs. Checked the condensate pump to ensure that it is operational. Checked the evaporator and condenser coils for buildup. Replaced 20x25x1 air filter. The temperature split is at 20+ With a supply air temperature of 50°. Compressor-10.0 RLA Condenser fan motor-1.1 FLA . Both of these readings are within the amperage rating for this unit. The system is operating properly at this time and is ready for the summer season.