Your furnace keeps your home warm all winter, but a malfunctioning one can also produce carbon monoxide, an odorless, colorless gas that can be dangerous in a short amount of time. We take this issue more seriously than almost anything else we deal with, and we want every homeowner we work with to know the signs that something’s wrong before it becomes an emergency.
A Cracked Heat Exchanger
The heat exchanger is the part of your furnace that separates the combustion process from the air circulating through your home. When it cracks, combustion gases, including carbon monoxide, can mix with the air your furnace is blowing into your living space. This is one of the most common sources of a dangerous furnace and one of the main reasons we inspect it closely during any furnace repair.
What to do: Never ignore a furnace inspection recommendation involving the heat exchanger. It’s not something that can be safely assessed by sight alone.
Symptoms That Feel Like the Flu
Low-level carbon monoxide exposure often produces symptoms that are easy to mistake for a common cold or the flu: headaches, dizziness, nausea, and fatigue. One clue that points to carbon monoxide instead is if symptoms improve when you leave the house and return once you’re back inside.
What to do: If multiple people in your household are feeling unwell at the same time, especially with these symptoms, get outside for fresh air and have your furnace checked before assuming it’s just a seasonal bug.
Soot or Discoloration Around the Furnace
Streaks of soot on or around the furnace cabinet, or discoloration near the burners, can point to incomplete combustion, which increases the risk of carbon monoxide production. This is one of the physical warning signs we look for during every heating inspection.
What to do: If you notice any dark staining near your furnace, don’t wait for your next scheduled maintenance visit to have it looked at.
A Yellow Pilot Light Instead of Blue
A healthy gas flame burns blue. A yellow, flickering, or orange flame is a sign that combustion isn’t happening properly, which can be tied to carbon monoxide production.
What to do: If you can see your furnace’s flame and it isn’t a steady blue, treat it as a reason to call, not something to keep an eye on.
Carbon Monoxide Detectors Are Not Optional
A working carbon monoxide detector on every level of your home is one of the most important safety investments you can make, and it’s often the only thing standing between a small furnace issue and a genuine emergency.
What to do: Test your detectors monthly and replace the batteries at least once a year. If your detector ever alarms, leave the house immediately and call emergency services before calling us.
Why We Take This So Seriously
Most furnace problems are inconvenient. Carbon monoxide issues are dangerous. Every furnace inspection and repair we perform includes a careful check of combustion safety, because your family’s health matters more to us than a quick fix.
Have Your Furnace Inspected with Confidence
Our certified technicians provide thorough, safety-focused furnace repair service Arlington Heights, Buffalo Grove, Highland Park, Hinsdale, Des Plaines, Mount Prospect, Northbrook, Palatine, Schaumburg, South Barrington, IL and we always explain exactly what we find before we get to work with no guesswork or upselling.
If you’re due for a replacement instead of a repair, our new furnace installation service delivers the same honest, safety-first approach in Arlington Heights, Buffalo Grove, Elk Grove Village, Schaumburg, Mount Prospect, and Palatine.
Call Midwest Comfort Heating & Cooling at 847-338-2777 to schedule same-day service, or
request an appointment online in under two minutes. That’s the Midwest Comfort Promise.
