FIRST CLEAN & CHECK UNDER SERVICE AGREEMENT FOR 3YR HEATING UNIT. CLEAN & CHECK BURNERS AND BURNER OPERATION. CHECK MANIFOLD GAS PRESSURE AND FOR PROPER VENTING. CHECK THERMOSTAT, AIR FILTER, AIRFLOW, ENERGY CONSUMPTION, HUMIDIFIER, AND ALL ELECTRICAL CONNECTIONS. CHECK HEAT EXCHANGER, HIGH LIMIT CONTROL. LUBRICATE ALL NECESSARY MOVING PARTS.