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