MAINTENANCE TUNE-UP FOR 5YR HEATING SYSTEM. LUBRICATE ALL NECESSARY MOVING PARTS, AND ADJUST BLOWER COMPONENTS. CLEAN AND CHECK BURNERS AND BURNER OPERATION. CHECK THERMOSTAT, HUMIDIFIER, ENERGY CONSUMPTION, FAN CONTROL, AIR FILTER, AIRFLOW, HEAT EXCHANGER, HIGH LIMIT CONTROL, GAS PRESSURE, AND ALL ELECTRICAL CONNECTIONS.