A furnace is almost always a background player at home, keeping you warm during the cold winter months. It regularly won't be noticed until a malfunction appears.
One cause could be that your furnace has a cracked heat exchanger. It can potentially be hazardous, so it’s worthwhile to learn the signs of a cracked heat exchanger and what to do if you believe that might be the problem.
What Is a Heat Exchanger in a Furnace?
A heat exchanger helps move heat from the combustion chamber inside your furnace to the air that flows through the ventilation. It usually accomplishes this via coils or tubes that heat up the air while functioning as a barrier to keep gas produced in the combustion chamber, called flue gasses, from leaking out into your home.