1ST MAINTENANCE TUNE-UP UNDER SERVICE AGREEMENT FOR 7YR HEATING UNIT. CHECK THERMOSTAT, AIR FILTER, AIRFLOW, ENERGY CONSUMPTION, HUMIDIFIER, FAN CONTROL, AND ALL ELECTRICAL CONNECTIONS. CHECK HEAT EXCHANGER, HIGH LIMIT CONTROL. CLEAN AND CHECK BURNERS AND BURNER OPERATION. CHECK MANIFOLD GAS PRESSURE AND FOR PROPER VENTING. ADJUST BLOWER, AND LUBRICATE ALL NECESSARY MOVING PARTS.