Furnace clean and tune. Found heat exchanger rusted. Igniter showing signs of ware. Cleaned burners. Ventor motor showing signs of bearing ware. Cycled system. Average life of this system is 14 years old. Recommend yearly service on both ac and furnace systems to ensure longer life. Found aprilaire system fan is seizing on operation. Recommend new aprilaire system. Quoted pkg clean and tune, electrostatic filter, and uv light. Furnace cleaning complete.