Performed preventative maintenance for a Lennox system. The evaporator coil’s are clean and in good condition . Tested the drain pan, drain line and condensate pump with several cups of hot water to ensure that there are no leaks or clogs. Replaced the air filter size 20x25x1. Checked all electrical components needed for air conditioning to ensure that they are secure and in good condition. The blower motor amp draw is at 5.5. The temperature split is at a 20. The condenser coil’s are clean and in good condition. The condenser amp draws are 1.1 for the fan and 13.8 for the compressor. The refrigerant pressures are 89/206. These are normal readings for 410-a refrigerant with an ambient temperature of 66°. The system is operating properly at this time.