When Rust On Your Old Furnace Signals Replacement Time
When rust appears on your furnace, especially on a system that’s been running for over a decade, it’s often more than just a cosmetic issue. That orange-brown corrosion you’re seeing could be your heating system’s way of telling you it’s time for a replacement.
In Ontario’s climate, where harsh winters and temperature fluctuations create the perfect storm for moisture buildup, rust typically develops on critical components like the heat exchanger, burners, or cabinet. This corrosion doesn’t just affect appearance—it weakens the structural integrity of your furnace, leading to cracks or holes that compromise both efficiency and safety.
The Hidden Dangers Behind Visible Rust
What makes rust particularly concerning is that it often signals problems you can’t see. A cracked heat exchanger, frequently caused by rust-induced corrosion, poses one of the most serious risks: carbon monoxide leaks. This colourless, odourless gas can cause headaches, dizziness, and in severe cases, fatal poisoning.
Ontario’s building codes mandate that furnaces with suspected CO leaks must be inspected immediately and replaced if compromised. For systems approaching the typical 15-20 year lifespan, rust often accompanies other hidden issues like deteriorated flue pipes, which can cause blockages or improper venting of exhaust gases.
Older furnaces may also harbour problems like faulty ignition systems or worn-out blower motors, all concealed behind rust-covered panels. These issues result in uneven heating, strange noises, or frequent cycling—clear signs that your system is working harder than it should and potentially creating fire hazards from overheating components.
Warning Signs Beyond the Rust
Pay attention to subtle indicators that often accompany rust formation. Increased dust accumulation throughout your home may stem from rusted filters or ducts allowing contaminants to circulate freely. A persistent musty odour could indicate mold growth in corroded areas where moisture has taken hold.
In aging systems, electrical wiring insulation can degrade alongside rust, raising the risk of short circuits or fires. Reduced airflow from clogged, corroded vents forces your system to overwork, accelerating wear on components like the inducer motor and driving up energy costs significantly.
Professional inspections become crucial at this stage, as technicians use specialized tools like combustion analysers to detect issues that aren’t immediately visible. Ignoring rust can lead to cascading problems that extend beyond your furnace itself, potentially indicating broader inefficiencies like inadequate insulation or poor duct sealing that affect your entire home’s heating performance.
Ensure Your Home’s Safety With Oosterveld
If you notice rust on your furnace, it may be time to consider a replacement to ensure safety and efficiency. Oosterveld, located in Guelph, Ontario, specializes in furnace inspection and installation services. Our team of experts is ready to assess your system and provide reliable solutions.
Don’t take any chances with your heating system. Trust professional guidance and make the right choice for your home. For dependable furnace inspection in Guelph, reach out to us today.