No doubt John is definitely an experienced technician, but he provided me misleading info about my furnace secondary heat exchanger was not cracked but was rusty. He quoted over $5200 to replace the h.e where he should know that this parts is under warranty by carrier dealership up to 20 years old furnace because there was a recall and lawsuit over some defective model built 2002-2011 Not necessarily to be the first owner of the house or the equipment. He also offered few very expensive option to sell a new furnace. Wish the company and the technician will keep updated and provide accurate info to the client.