MAINTENANCE CHECK-UP FOR 4 YR A/C UNIT. DNS SERVICE AGREEMENT. CLEAN AND CHECK CONDENSER COIL. LUBRICATE ALL NECESSARY MOVING PARTS AND ADJUST BLOWER COMPONENTS. CHECK FREON, DRAINAGE, THERMOSTAT, AIRFLOW, AIR FILTER, ENERGY CONSUMPTION, COMPRESSOR DELAY SAFETY CONTROLS, AND ALL ELECTRICAL CONNECTIONS. EVERYTHING IS OPERATING GREAT.