FIRST MAINTENANCE TUNE-UP UNDER SERVICE AGREEMENT FOR 10YR HEATING UNIT. CLEAN AND CHECK BURNERS AND BURNER OPERATION. CHECK MANIFOLD GAS PRESSURE AND FOR PROPER VENTING. CHECK HEAT EXCHANGER, HIGH LIMIT CONTROL. ADJUST BLOWER COMPONENTS AND LUBRICATE ALL NECESSARY MOVING PARTS. CHECK THERMOSTAT, AIR FILTER, AIRFLOW, FAN CONTROL, HUMIDIFIER, AND ALL ELECTRICAL CONNECTIONS.