1ST CLEAN AND CHECK UNDER SERVICE AGREEMENT FOR 2YR HEATING UNIT. ADJUST BLOWER COMPONENTS, LUBRICATE ALL NECESSARY MOVING PARTS. CLEAN AND CHECK BURNERS AND BURNER OPERATION. CHECK THERMOSTAT, AIR FILTER, AIRFLOW, ENERGY CONSUMPTION, HEAT EXCHANGER HIGH LIMIT CONTROL. CHECK MANIFOLD GAS PRESSURE AND FOR PROPER VENTING. CHECK HUMIDIFIER AND ALL ELECTRICAL CONNECTIONS.