Performed preventative maintenance on an Ameristar AC unit. Model number: M4AC6030A1000AA. Serial number: 18283Y7T5F. Upon arrival the unit was off at the thermostat. Homeowner turned the unit on at the thermostat. Went to the basement unit and watched it run. Turned unit off at the switch. Removed the panel to the evaporator coil. Checked the coil 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 the water pump out properly. Removed the panels to the AC. Checked all electrical connections to make sure they were properly secure. Checked the blower motor and fan for any dust build up. Took an amp draw for the motor. Running within manufacture’s specs. Placed panels back on the unit and turned the switch back on. Went outside to the condenser and watched it run. Checked the coils for any dirt build up. Removed the panel. Checked the capacitor and contactor. Both are within the manufacture’s