Performed preventative maintenance on a Lennox AC system. Upon arrival the unit was on at the thermostat. I adjusted the temperature so the AC would keep running. 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 it drain properly. Poured water into the condensate pump and watched it pump out properly. Removed the panels to the furnace. Checked the electrical connections to make sure they were properly secure. Checked the blower motor and fan for any dust build up. Checked the capacitor on the blower motor. Running within manufacture’s specs. Customer recently changed the filter. Took an amp draw for the blower motor. Running within the manufacture’s specs. Placed the panels back in 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 brus