D and D Mechanical is associated with HMS Warranty (which should be a warning in and of itself). They came to look at our furnace. They poked around, didn't really look and told us that it that they would recommend a replacement and the warranty company would cover. We were without a furnace for 2 weeks. No follow up calls, nothing. Finally we went to Superior Water and got a new furnace - go look at them instead of D and D. D and D Mechanical works with the warranty company and not the homeowner. They will say whatever they can so the warranty company doesn't have to pay since it's the warranty company pays them. By the way, mysteriously we had no hot water after D and D Mechanical came out ... figured out they had done something to our water heater controls. Thank goodness we took care of that on our own. Buyer Beware!