MAINTENANCE TUNE-UP FOR 2 HT UNITS, 10 YR, AND 14 YR. CHECK THERMOSTAT, AIR FILTER, AIRFLOW, HIGH LIMIT CONTROL, FAN CONTROL, HEAT EXCHANGER, ENERGY CONSUMPTION, AND ALL ELECTRICAL CONNECTIONS. CLEAN AND CHECK BURNERS AND BURNER OPERATION. CHECK MANIFOLD GAS PRESSURE AND FOR PROPER VENTING. LUBRICATE ALL NECESSARY MOVING PARTS AND ADJUST BLOWER COMPONENTS. EVERYTHING IS RUNNING GOOD.