MAINTENANCE TUNE-UP FOR THE FIRST APPOINTMENT, UNDER SERVICE AGREEMENT, FOR 7YR HEATING UNIT. CLEAN AND CHECK BURNERS AND BURNER OPERATION. CHECK HEAT EXCHANGER, HIGH LIMIT CONTROL, FAN CONTROL, AIR FILTER, THERMOSTAT, ENERGY CONSUMPTION, AIRFLOW, HUMIDIFIER, AND ALL ELECTRICAL CONNECTIONS. ADJUST BLOWER COMPONENTS AND LUBRICATE ALL NECESSARY MOVING PARTS. CHECK MANIFOLD GAS PRESSURE AND FOR PROPER VENTING.