SECOND CLEAN AND CHECK UNDER SERVICE AGREEMENT FOR 3 YEAR HEATING SYSTEM. LUBRICATE ALL NECESSARY MOVING PARTS. AND ADJUST BLOWER COMPONENTS. CLEAN AND CHECK BURNERS AND BURNER OPERATION. CHECK HEAT EXCHANGER, HIGH LIMIT CONTROL. CHECK MANIFOLD GAS PRESSURE AND FOR PROPER VENTING. CHECK THERMOSTAT, AIR FILTER, AIRFLOW, ENERGY COMSUMPTION. FAN CONTROL, AND ALL ELECTRICAL CONNECTIONS.