Performed preventative maintenance for an Lennox elite series system. Model #HS29-036-2p, serial #5804E17927. Upon arrival the system was calling for AC so I powered down the thermostat. I powered the system down at the furnace and removed the access panels. The evaporator coils are clean and in fair condition. Tested the drain pan and drain line with several bottles of water to ensure that there are no leaks or clogs. The homeowner replaces his own air filter 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 14.3 for the compressor and.84 for the fan. The temperature split is at a 20° differential. No charge for today MA.