This winter, our furnace technicians at AAA Heating and Plumbing have noticed a serious trend across Calgary homes. During furnace repair calls and routine inspections, we are finding cracked heat exchangers far more often than expected. In roughly one out of every four homes we’ve tested, carbon monoxide levels were higher than they should be. Many of these homeowners had no idea there was a problem.
What makes this issue concerning is that furnaces with cracked heat exchangers often continue to run. Homes stay warm, and heating systems appear to be working normally. Meanwhile, carbon monoxide can leak into living spaces without warning. Understanding why this happens and how to reduce risk is essential for homeowner safety.
How a Furnace Heat Exchanger Affects Safety
Why Cracked Heat Exchangers Are Showing Up More Often
Furnaces work hardest during winter. Long run times, cold outdoor temperatures, and aging components all increase stress on HVAC systems. In Calgary homes with older equipment or limited maintenance, heat exchangers are more likely to crack over time.
Metal expands and contracts every time the furnace cycles on and off. After years of use, especially in systems that are 20 years old or older, this stress can cause failure. Restricted airflow from dirty air filters or improper combustion can make furnace problems worse and speed up damage.
Carbon Monoxide and Hidden Furnace Problems
Carbon monoxide exposure is one of the most serious risks tied to cracked heat exchangers. In many homes we’ve visited, elevated carbon monoxide levels were present even though homeowners felt no immediate symptoms.
Some people experience headaches, dizziness, or fatigue without realizing their furnace is the cause. Others notice nothing at all. This is why carbon monoxide detectors are critical, but they should never replace regular furnace maintenance and professional testing.
Why Furnace Repair and Emergency Furnace Repair Matter
When a cracked heat exchanger is confirmed, the furnace cannot safely operate. In many cases, emergency furnace repair is required to shut the system down and prevent further risk. Heat exchangers cannot be welded or patched safely. Once cracked, replacement parts or full furnace replacement must be considered.
Furnace repair services focus on safety first. A trained furnace technician will measure combustion gases, inspect internal components, and determine whether furnace replacement is the most cost effective option. Older systems often benefit more from replacement, especially when energy efficient models can reduce long-term heating costs.
Preventative Maintenance Reduces Risk
Preventative maintenance is one of the most effective ways to reduce the risk of cracked heat exchangers and carbon monoxide exposure. A preventive maintenance program includes inspections, airflow checks, and combustion testing. These steps help identify early signs of damage before they become dangerous.
Regular furnace maintenance also improves efficiency and reliability. Systems that receive consistent care tend to last longer and perform better. Preventive maintenance protects heating systems and ensures your furnace operates safely throughout the winter.
When Furnace Replacement Makes Sense
In some cases, furnace replacement is the safest option. Older HVAC systems may not support modern safety standards or replacement parts. Newer furnaces are more energy efficient and provide better airflow control, reducing stress on internal components.
While replacement may feel like a big step, it can be more cost effective over the long term. Lower energy use, fewer repairs, and improved safety all add value. Our maintenance team helps homeowners understand their options clearly and without pressure.
Professional Furnace Repair Services in Calgary
At AAA Heating and Plumbing, we provide furnace repair in Calgary and surrounding areas with a strong focus on safety. Our HVAC services include inspections, emergency furnace repair, preventative maintenance, and full furnace replacement when needed.
We take the time to explain findings and ensure your furnace is operating safely. Whether your system is new or has been heating your home for decades, our goal is to ensure your furnace protects your home, not puts it at risk.
Keeping Calgary Homes Safe This Winter
Cracked heat exchangers are more common than many homeowners realize. This winter has shown how often furnace problems can exist without clear warning signs. Regular service in Calgary homes is essential to reduce carbon monoxide risks and protect families.
If your furnace has not been inspected recently, or if it is showing signs of trouble, professional testing can provide peace of mind. AAA Heating and Plumbing is committed to keeping Calgary homes safe, warm, and properly informed throughout the heating season.
