What causes cracks to form in a gas furnace heat exchanger?
In the normal course of a gas furnace operation, the heat exchanger experiences repeated heating and cooling, which causes a corresponding expansion and contraction of the heat exchanger metal. As the heat exchanger ages over the years cracks will tend to form in areas of the heat exchanger that are weak, such as the areas that have been welded together. More weak spots and holes will form as a result of corrosion. Corrosion of the heat exchanger often signifies problems with the exhaust venting. It is always a good idea to have us clean and inspect your furnace once a year.
In the normal course of a gas furnace operation, the heat exchanger experiences repeated heating and cooling, which causes a corresponding expansion and contraction of the heat exchanger metal. As the heat exchanger ages over the years cracks will tend to form in areas of the heat exchanger that are weak, such as the areas that have been welded together. More weak spots and holes will form as a result of corrosion. Corrosion of the heat exchanger often signifies problems with the exhaust venting. It is always a good idea to have us inspect your furnace once a year.
