Performed preventative maintenance on a Lennox AC system. Upon arrival the system was off. I turned the system on at the thermostat. Went to the room and watched the system run. Turned the system off at the switch. Opened the panel to the evaporator coil. Inspected the coils for any dust build up. Poured water into the condensate trap and watched the water drain properly. Poured water into the condensate line and watched water drain properly. Removed the panels to the the furnace. Checked the electrical connections to make sure they were properly secure. Checked the blower motor and fan for any dust build up. Changed the 14x20x1 filter. Closed the panels and watched the unit run. Went outside to the condenser and watched it run. Checked the coils for any dirt build up. Removed the panel and brushed out any spiderwebs. Checked the contactor and capacitor. Both are running within the manufacture’s specs. Took an amp draw for the fan, .83. Took an amp draw for the compressor, 5.68 amps. P