1ST MAINTENANCE CHECK-UP UNDER SERVICE AGREEMENT FOR 9 YR HT UNIT. CLEAN AND CHECK BURNERS AND BURNER OPERATION, CHECK MANIFOLD GAS PRESSURE AND FOR PROPER VENTING. LUBRICATE ALL NECESSARY MOVING PARTS, AND ADJUST BLOWER COMPONENTS. CHECK HEAT EXCHANGER, HIGH LIMIT CONTROL, FAN CONTROL, THERMOSTAT, AIRFLOW AIR FILTER, ENERGY CONSUMPTION, AND ALL ELECTRICAL CONNECTIONS. EVERYTHING IS OPERATNG GOOD.