Have you ever noticed your furnace failing right when you need it most? In many cases, the problem lies with the hot surface igniter (HSI), a small but critical component responsible for igniting gas and starting the heating cycle. At PartsHnC, we help you understand why igniters fail and how to prevent costly breakdowns.
In modern gas furnaces, the hot surface igniter is an electrical resistance device made from silicon carbide or silicon nitride. When powered, it heats up to extremely high temperatures, glowing bright orange to ignite the gas and produce heat. Unlike traditional furnaces with standing pilot lights, modern systems use igniters only when needed, making them more energy-efficient. However, this efficiency comes with wear and tear, and most igniters last between five and ten years depending on usage and material quality.
Several factors contribute to premature igniter failure. These components are highly fragile and can crack or break with minimal physical stress. Frequent furnace cycling places repeated thermal strain on the igniter, accelerating deterioration. Electrical issues such as voltage spikes or faulty wiring can instantly damage the element, while dirt, dust, rust, and oil contamination weaken the igniter surface over time. Excessive gas pressure, malfunctioning control boards, and overheating within the furnace can also shorten its lifespan. Additionally, environmental factors, including the corrosive nature of propane systems, further contribute to degradation.
Think of a hot surface igniter like a light bulb filament: it glows intensely but is delicate and prone to wear. If your furnace is experiencing ignition issues, replacing the igniter with a high-quality part can restore reliable performance. Visit PartsHnC for genuine replacement parts, expert guidance, and tips to keep your heating system running efficiently year-round.
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Disclaimer: This Video is for informational purposes only and is not a substitute for professional advice. Always consult with a qualified expert before making any decisions. We are not responsible for any actions taken based on this information.
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