Cracks in a heat exchanger can ensue after thousands of on-off cycles; when the furnace is activated, the chamber expands and contracts when it is shut down. The cracks may appear at several locations all over the heat exchanger, such as the main body and the blower cone. Saltzman even ran a test wherein he tried to pass water through the cracks; the water came out instead at popped factory seams, while certain sections even had rusted holes. Saltzman’s experiment underlines the importance of periodic inspections of the furnace. Putting the heating equipment through furnace repair in Andover, MN may be possible if it is less than ten years old and/or covered by manufacturer warranty. However, your technician will recommend replacement if the heating system is ten years old and has shown marked drops in efficiency.
http://www.libertycomfortsystems.com/dealing-with-heat-exchangers-through-furnace-repair-in-ramsey-mn/
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