FIRST SERVICE CHECK-UP FOR 3YR HEATING UNIT. ADJUST BLOWER COMPONENTS, LUBRICATE ALL NECESSARY MOVING PARTS, AND CHECK ALL ELECTRICAL CONNECTIONS. CLEAN AND CHECK BURNERS AND BURNER OPERATION. CHECK THERMOSTAT, AIR FILTER, HUMIDIFIER, HEAT EXCHANGER, HIGH LIMIT CONTROL, FAN CONTROL, ENERGY CONSUMPTION, AND AIRFLOW.