1ST MAINTENANCE CHECK-UP PER SERVICE AGREEMENT FOR 7 YR HT UNIT. CHECK MANIFOLD GAS PRESSURE AND FOR PROPER VENTING. LUBRICATE ALL NECESSARY MOVING PARTS, AND ADJUST BLOWER COMPONENTS. CLEAN AND CHECK BURNERS AND BURNER OPERATION. CHECK HEAT EXCHANGER, FAN CONTROL, HIGH LIMIT CONTROL, THERMOSTAT, AIRFLOW, AIR FILTER, ENERGY CONSUMPTION, AND ALL ELECTRICAL CONNECTIONS. EVERYTHING IS WORKING GOOD.