1ST MAINTENANCE CHECK-UP UNDER SERVICE AGREEMENT FOR 2 HT UNITS, BOTH 8 YR. CHECK MANIFOLD GAS PRESSURE AND FOR PROPER VENTING. CLEAN AND CHECK BURNERS AND BURNER OPERATION. CHECK AIRFLOW, AIR FILTER, THERMOSTAT. FAN CONTROL, HIGH LIMIT CONTROL, HEAT EXCHANGER, ENERGY CONSUMPTION, AND ALL ELECTRICAL CONNECTIONS. LUBRICATE ALL NECESSARY MOVING PARTS AND ADJUST BLOWER COMPONENTS. EVERYTHING IS RUNNING GREAT.