Performed preventative maintenance for a Lennox ac system. Model #14ACX-048-230-14, serial #1916D09158. Upon arrival the system was off at the thermostat. I powered the system down and removed the access panel. The Evaporator coil’s are clean and in good condition. I tested the drain pan and drain line with several bottles of water to ensure that there are no leaks or clogs. I replaced the air filter (homeowner supplied) size 20x25x1. I checked all electrical connections to ensure that they are secure and in good condition. The blower motor and blower wheel are both clean and in good condition. I re attached the access panels and powered the system back up. I called for ac and observed the system starting normally. The condenser coils are clean and in good condition. The condenser amp draws are .56 for the fan and 7.5 for the compressor. The system has a 20° differential. The system is operating properly at this time. Homeowner would like to start ccm membership in the fall.