13 POINT MAINT. TUNE-UP PER SERVICE AGREEMENT FOR 6 YR HT UNIT. CLEAN AND CHECK BURNERS AND BURNER OPERATION. CHECK MANIFOLD GAS PRESSURE AND FOR PROPER VENTING. CHECK HIGH LIMIT CONTROL, FAN CONTROL, HEAT EXCHANGER, THERMOSTAT, AIRFLOW, AIR FILTER, ENERGY CONSUMPTION, AND ALL ELECTRICAL CONNECTIONS. LUBRICATE ALL NECESSARY MOVING PARTS AND ADJUST BLOWER COMPONENTS. EVERYTHING IS RUNNING GOOD.