A cracked heat exchanger in your furnace can leak carbon monoxide into your home. The metal weakens from repeated heating and cooling cycles, like bending a paperclip until it breaks. You can't see or smell it, but it kills.
Carbon monoxide. Yes. This is a critical safety warning. We talked about how systems degrade, how that metal expands and contracts. The fine wine thing. Exactly. Your heat exchanger, the metal chamber where the fire burns, heats up and cools down thousands of times. It's like bending a paperclip back and forth. Eventually, the metal fatigues. It can crack. And if it cracks— If it cracks, those combustion gases, including carbon monoxide, which is odorless and colorless, can escape the system and leak right into your living space. That is a silent killer.
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