Performed preventative maintenance for a high efficiency Lennox ac system. Model #13ACD-060-230-01, serial #5805L27188. Upon arrival the thermostat was in the off position. I powered the system down at the furnace and removed the access panels. The evaporator coil’s are clean but in fair condition. The elbows of the evaporator coil are severely rusted. I tested the drain pan and drain line with several bottles of water to ensure that there are no leaks or clogs. I cleaned out the trap and replaced the 16x25x1 air filter chud supplied. I inspected 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 healthy climate uv light was replaced last year and is still operating properly. I closed the dampener and powered down the humidifier for the summer. The blower motor amp draw is at a 8.10. The condenser coils are dirty but in good condit