Performed preventative maintenance on a Lennox AC system. Model number: XC14-048-230-08. Serial number: 5814K07115. Upon arrival the system was off at the thermostat. I turned the system on and 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. Poured water into the condensate trap and watched the water drain out properly. 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 fan for any dust build up. Replaced the 20x25x1 filter. Turned off the humidifier. Took an amp draw of the 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 and brushed out any s