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- 22:35, 29 December 2025 Gwaynehgsh talk contribs created page Furnace Not Heating: Heat Exchanger and Safety Considerations (Created page with "<html><p> When a furnace quits producing heat on a cold night, the instinct is to blame a thermostat or a tripped breaker. Those cause plenty of service calls, but the more consequential failures often sit deeper inside the cabinet. The heat exchanger, an unassuming metal chamber that keeps flames separated from breathing air, is the heart of the safety conversation. When it fails, it is not just about comfort. It is about the risk of carbon monoxide mixing into your hom...")
