1ST MAINTENANCE TUNE-UP UNDER SERVICE AGREEMENT FOR 1 YR HEATING UNIT. INSTALLED 2 TON GAS PACK 4 VENT ADC & UV. CLEAN AND CHECK BURNERS AND BURNER OPERATION. CHECK HEAT HIGH LIMIT CONTROLS. CHECK THERMOSTAT, AIR FILTER, AIRFLOW, HUMIDIFIER, AND ALL ELECTRICAL CONNECTIONS, MADE SURE EQUIPMENT WAS INSTALLED PROPERLY AND MADE SURE WORK AREA WAS CLEAN WHEN FINISH. EVERYTHING IS RUNNING GREAT.