Gas Furnaces and the Silicon Carbide Hot Surface Igniter
An orchestra of events are necessary to ignite your gas furnace’s furnace flame and reach its target location – sparks from an silicon carbide hot surface ignitor (HSI) are essential in making this happen. HSIs are resistance heaters that glow red hot when voltage is applied. They typically last five to ten years before needing replacement periodically. Low Voltage Silicon carbide hot surface ignitors (HSIs), are responsible for heating up the fuel/air mixture in your furnace so it can ignite. While pilot lights often consume more energy than their furnace counterparts, an HSI will only activate when sent a signal from its control board to do so. With its ability …
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