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