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How to Prevent a Cracked Heat Exchanger in Your Furnace

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small_5330062509A cracked heat exchanger is one of the most dangerous things that can go wrong with your furnace, because it allows carbon monoxide to be released into your home’s air. If carbon monoxide levels get too high in your home, your family can become ill and in severe cases it can be fatal. When many homeowners hear about the dangers of cracked heat exchangers, they wonder what they can do to prevent the problem from happening in the first place. Today we’re going to help you do just that by talking about how to prevent a cracked heat exchanger in your furnace!


How do heat exchangers develop cracks?


Before you learn about how to prevent a cracked heat exchanger, it’s useful to know how those cracks develop in the first place. Some of the most common causes include:


    • Normal wear and tear. Your heat exchanger heats up and cools down during every heating cycle, and your home goes through many heating cycles throughout the day. Every time that the heat exchanger heats up and cools down, its metal walls expand and contract. Over time, this repeated expanding and contracting will create cracks in the heat exchanger’s walls.





How can you prevent a cracked heat exchanger?



    • Consistently change your air filter. By always keeping a fresh filter installed in your furnace, you will prevent major airflow issues that would otherwise cause your heat exchanger to overheat and crack.


    • Keep vents open and clear. Make sure that all of the supply and return vents in your home are completely open and clear of any obstructions such as furniture or other large objects. This is another way that you can prevent airflow issues that would otherwise cause heat exchanger cracks.



If you have any questions about how to prevent a cracked heat exchanger, or if you’d like a heating system serviced or installed in your home, contact Jerry Kelly, your St. Charles, MO, furnace installation and repair contractor. We provide service all over the St. Louis area, including towns like Ballwin, Chesterfield and Clarkson Valley, MO.


photo credit: quinn.anya via photopin cc


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