Performed preventative maintenance on a Lennox AC system. Model number: 14ACX5024-23A18. Serial number: 1916F53792. Upon arrival the unit was off. I turned the unit on at the thermostat. Went to the unit and watched it 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 it drain properly. Watched the water drain into the gravity drain 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. Checked the blower motor capacitor. Running within the manufacture’s specs. Took an amp draw for the blower motor. Running within the manufacture’s specs. Replaced the 14x25x1 filter. Placed the panels back on the unit and watched the unit run. Went outside to the condenser and watched the unit run. Checked the coils for any dirt build up. Removed the panel and