2ND MAINTENANCE TUNE-UP UNDER SERVICE AGREEMENT FOR HEAT UNIT, CLEAN AND CHECK BURNERS AND BURNER OPERATION. CHECK GAS HIGH LIMIT LEVELS. LUBRICATE ALL NECESSARY MOVING PARTS, AND ADJUST BLOWER COMPONENTS. CHECK THERMOSTAT, AIR FILTER, AIRFLOW, HUMIDIFIER, AND ALL ELECTRICAL CONNECTIONS, INSTALLED ADC PREM 5/2 WARRANTY. MADE SURE WORK AREA WAS CLEAN WHEN FINISH, EVERYTHING IS RUNNING WELL,