Performed preventative maintenance on a Lennox AC system. Upon arrival the unit was off at the thermostat. I turned the unit on at the thermostat. Went downstairs and watched the unit run. Turned the unit off at the switch. Removed the panel to the evaporator coil. Inspected the coils for any dust build up. I poured water into the condensate trap and watched the water drain out properly. I poured water into the condensate pump and watched the water pump out properly. Removed the panels to the furnace. Checked all electrical connections to make sure they were properly secure. Checked the blower motor and wheel for any dust build up. Changed the 16x25x5 filter supplied by the homeowner. Took an amp draw of blower motor. Running within the manufacture’s specs. Placed the panels back on the unit and watched it run. Went outside to the condenser and watched it run. Checked the coils for any dirt build up. Removed the panel. Checked the contactor and capacitor. The capacitor is a little low