2ND MAINT. TUNE-UP UNDER SERVICE AGREEMENT FOR HEATING UNIT. INSTALLED UV 5/2, EARNED SERVICE AGREEMENT. CLEAN AND CHECK BURNERS AND BURNER OPERATION. CHECK THERMOSTAT, AIR FILTER, AIRFLOW, HEAT EXCHANGER, HUMIDIFIER, ENERGY CONSUMPTION, AND ALL ELECTRICAL CONNECTIONS. MADE SURE EQUIPMENT WAS INSTALLED PROPERLY AND WORK AREA WAS CLEAN WHEN FINISH. EVERYTHING IS RUNNING GOOD.