Cleaned and maintained a Trane air conditioning system during a routine tune-up. Inspected the evaporator and condenser coils, checked refrigerant pressures, and tightened all electrical connections. Cleaned the condenser coil, cleared debris from around the unit, and flushed the condensate drain line. Replaced the dirty air filter and verified the thermostat’s calibration. System is now running efficiently and ready for peak summer heat.