Carbon monoxide (CO) is an invisible threat—odorless, colorless, and potentially deadly. When HVAC systems, especially gas furnaces, aren't properly maintained, they can become a source of carbon monoxide leaks in the home.
But the good news? CO leaks are preventable. With the right maintenance and awareness, you can keep your family safe and your system running smoothly.
What Causes Carbon Monoxide Leaks in HVAC Systems?
CO leaks most commonly happen when something goes wrong in your heating system’s combustion process. Here are a few red flags:
- Cracked heat exchanger – This is the most common cause of leaks. A crack can allow combustion gases to mix with the air being circulated into your home.
- Poor ventilation – Blocked flues or chimneys can trap gases and redirect them indoors.
- Faulty installation – An improperly installed furnace or water heater can increase CO risk.
- Lack of maintenance – Dust buildup, corrosion, and general wear can all impact how safely your system operates.
Warning Signs of a Carbon Monoxide Leak
Carbon monoxide itself can’t be seen or smelled—but your body may start showing symptoms such as:
- Headaches
- Dizziness
- Nausea
- Fatigue
- Shortness of breath
If multiple people in the home feel sick at the same time or symptoms go away when you're outside, that’s a strong indicator something’s wrong.
How to Prevent a Carbon Monoxide Leak
- Schedule annual HVAC maintenance – Our trained technician will inspect your system for cracks, leaks, or signs of trouble before the heating season begins.
- Install CO detectors on every level of your home – Especially near sleeping areas. Test them monthly and change batteries regularly.
- Keep vents and chimneys clear – Make sure nothing is blocking the flow of exhaust gases.
- Don't ignore strange smells or sounds – While CO is odorless, burning or metallic smells could indicate other combustion issues that may lead to CO buildup.
- Choose trusted professionals – Poor installation or shortcuts can create long-term safety risks. Always hire experienced, licensed HVAC experts.
Stay Safe This Season with Aire Serv of Bel Air
Carbon monoxide safety isn’t just about having a detector—it’s about having a system you can trust. At Aire Serv of Bel Air, we inspect every heating system with safety top of mind. If it’s been more than a year since your last furnace checkup, now’s the time.
