CLEAN AND CHECK 5 YR HEATING UNIT. CLEAN AND CHECK BURNERS AND BURNER OPERATION. LUBRICATE ALL NECESSARY MOVING PARTS, AND ADJUST BLOWER COMPONENTS. CHECK THERMOSTAT, HUMIDIFIER, AIR FILTER, AIRFLOW, ENERGY CONSUMPTION, COMPRESSOR DELAY SAFETY CONTROLS, AND ALL ELECTRICAL CONNECTIONS. INSTALLED UV. EVERYTHING IS RUNNING GREAT.