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What Is a Furnace Heat Exchanger and Why Is It Important?
A heat exchanger isn’t necessary in an electric furnace ... offer a lifetime warranty on all furnace parts. Others, including Carrier, Heil, Rheem and Janitrol, offer 20-year parts warranties ...
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12 Common Furnace Problems and How to Fix Them, According to Experts
Other causes, like air handler issues or a cracked heat exchanger, require a professional. Related: 31 Smart and Surprising ...