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Hot surface igniter test
video learning tutorial

This video tutorial illustrates how to test a hot surface silicon carbide ignitor, with the help of a good volt meter with ohm’s scale that reads 200 for this test, hope this tutorial
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  Hot surface ignitor education

The hot surface ignitor is a electrical component that is wildly used in most newer manufactured gas furnaces, like Bryant, Trane, Carrier, Rheem, and lennox just to name a few. Every time your furnace comes on the hot surface igniter is electrically energized with 120 volts and glows red hot for about thirty seconds igniting the gas burners at your furnace, similar to the way your kitchen counter top toaster works, when you push the lever down the element in the toaster turns red hot to toast your bread. Because your furnace may cycle on and off, up to four to six times per hour during the winter season, the hot surface igniter gets used a lot. Like the equivalent of you using your toaster 25,920 times in a six month period. Because it gets used so much the hot surface igniter is the only component of the gas furnace that needs to be replaced routinely, about every four to six years on average. There are two types of hot surface igniters that are used in gas furnaces, the first one is a hot surface igniter made from material called silicon carbide, and this is the older style ignitor that should be handled with care because it is very fragile. The second newer type hot surface igniter is made from material called silicon nitride; this is a more durable material and is not as fragile as the silicon carbide, the more durable silicon nitride igniter will last longer, giving it sometimes twice the life span of it's less superior hot surface silicon carbide ignitor. If your furnace has the old silicon carbide ignitor and you have a technician replacing it, you may want to ask about upgrading to a newer hot surface silicon nitride ignitor that may last longer.

Because we know an ignitor is known to fail periodical, every four to six years. It would be a good idea to have an extra one on hand. So that on the coldest day of the year, if that ignitor was to fail. You could make that replacement in just a few minutes and save yourself an expensive service call.



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