Carbon monoxide (CO) is often called the “silent killer.” It has no color, taste, or smell, yet it can cause serious illness or even death if it builds up inside a home. Because many heating systems run on fuel like natural gas, propane, or oil, they are one of the most common sources of CO exposure. Understanding the risks and knowing how to protect your household is essential.
How Heating Systems Can Produce Carbon Monoxide
When fuel burns, it produces carbon monoxide. Normally, a well-maintained system vents those gases safely outside. Problems occur when something interferes with that process:
- Cracked heat exchangers
- Blocked or damaged flue pipes
- Poor ventilation around the furnace or boiler
- Incomplete combustion from dirty burners
Any of these can cause CO to leak indoors instead of exiting the home.
Warning Signs to Watch For
Since you can’t see or smell carbon monoxide, the signs often show up in how you feel or how your system behaves. Possible warning signs include:
- Frequent headaches, dizziness, or nausea among family members
- A furnace that runs but doesn’t heat properly
- Soot streaks or rust around the unit
- Pilot lights that go out repeatedly or burn with a yellow flame instead of blue
Why Regular Maintenance Matters
Professional maintenance isn’t just about efficiency. A yearly inspection helps ensure your heating system is venting properly and that critical parts, like the heat exchanger, aren’t damaged. Catching issues early greatly reduces the risk of carbon monoxide leaks.
Carbon Monoxide Detectors: A Must-Have
Even with the best maintenance, no home should be without CO detectors. Place them near bedrooms, living areas, and on every level of your house. Check the batteries regularly and replace the detectors according to the manufacturer’s schedule.
What to Do If You Suspect a Problem
If you think there may be carbon monoxide in your home:
- Leave the house immediately and get fresh air.
- Call emergency services.
- Do not re-enter the home until it’s declared safe.
- Have a licensed professional inspect and repair the heating system before turning it back on.
Carbon monoxide awareness isn’t something to take lightly. With proper maintenance, working detectors, and quick action when warning signs appear, you can keep your heating system running safely and protect your household from a danger you can’t see.