Performed preventative maintenance on a Lennox AC system. Model number: 13ACX-030-230-17. Serial number: 1914K36491. Upon arrival the AC was off. Turned the unit on at the thermostat. Went downstairs to the unit and watched it run. Turned the unit 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 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. Homeowner recently changed the filter. Took an amp draw for the blower motor. Running within manufacture’s specs. Placed the panels back on the unit and watched it run. Went outside to the condenser. Unit was not running. Went down to the breaker panel and