Are you one of the many people who use a natural gas furnace to provide heat for the winter? If so, then you probably understand why they’re so popular for home comfort: gas furnaces are dependable and provide a level of heating that few other systems can top—and that’s especially important in our part of the country, when it gets cold.
You need to take some special precautions with gas furnaces, however. They aren’t automatically dangerous—they’re built with safety uppermost in mind—but they may run into some troubles that might lead to carbon monoxide poisoning. (Always have CO detectors in your home if you use natural gas.) Perhaps the most worrying problem is a cracked heat exchanger, which we’re going to look at now.
