Carbon Monoxide from Furnace — Warning Signs

Professional Carbon Monoxide from Furnace — Warning Signs in Asheville & Western NC

Why Carbon Monoxide From a Furnace Is So Dangerous

Carbon monoxide (CO) is a colorless, odorless byproduct of incomplete fuel combustion in gas and propane furnaces. Under normal operating conditions, the flue system channels all combustion gases safely outdoors. When a component fails — a cracked heat exchanger, an obstructed flue pipe, a faulty draft inducer motor, or deteriorated venting — CO can seep into your living areas. Hundreds of Americans die from CO poisoning each year, making this a genuinely life-threatening hazard. Older gas furnaces in Asheville and WNC homes carry elevated risk, particularly when a recent safety inspection has not been performed.

Signs That Demand Immediate Attention

CO exposure produces symptoms that mimic the flu: headaches, dizziness, nausea, mental confusion, and persistent fatigue. The critical clue is timing — if everyone in the household feels ill at the same time and symptoms coincide with furnace operation, evacuate immediately and dial 911. On the equipment side, watch for a yellow or orange burner flame instead of blue, soot or scorch marks near the furnace cabinet, unusual condensation on nearby windows, and a pilot light that will not stay lit.

Protecting Your Household

CO detectors belong on every floor of your home and near every sleeping area — they are your earliest warning system. Beyond alarms, the only definitive way to verify furnace safety is a professional combustion analysis. Quality Mechanical conducts thorough furnace safety inspections covering heat exchanger integrity, combustion gas analysis, flue draft measurement, and gas-line leak detection. For any gas furnace past the 15-year mark, we urge annual inspections. If a cracked heat exchanger is found, the furnace must be shut off on the spot — at that point either the heat exchanger or the entire furnace needs to be replaced.