Performed preventative maintenance for a Lennox AC system. Model # CX34-36B-6F-2 , serial #6014K01297 . Upon arrival the homeowner had the thermostat in the off position. I powered down the system at the furnace and removed the access panel. The evaporator coils are dirty on one the right side. I tested the drain pan, drain line and condensate pump with several bottles of water to ensure that there are no leaks or clogs. The air filter was recently replaced by the homeowner size 20x25x1. The blower motor and blower wheel are both clean and in good condition. I checked all electrical connections to ensure that they are secure 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 severely clogged and should be cleaned. The condenser amp draws are 9.12 for the compressor and .93 for the fan. The temperature split is at a 18° differential. After presenting my findings the hom