{"product_id":"tempstar-hot-surface-igniter-for-t8mpt100j20b1-silicon-nitride-hsi-ships-today","title":"Tempstar Hot Surface Igniter for T8MPT100J20B1 - Silicon Nitride HSI | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM hot surface igniter (HSI) is the exact ignition component for the Tempstar T8MPT100J20B1 two-stage gas furnace. The igniter (Tempstar part 1172533) glows red-hot when the gas valve opens, lighting the burner gas at the start of every heat cycle. Built from durable igniter material rated for thousands of cycles, it is the single most common furnace failure point. When an igniter cracks or burns out, the furnace draws air, runs the inducer, but never lights — leaving you with no heat and often a flashing fault code on the control board. Replacing the igniter restores reliable, fast ignition.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOEM Part Number\u003c\/td\u003e\n\u003ctd\u003e1172533 (IGNITOR HSI)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eHot Surface Igniter (HSI)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eTempstar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits Model\u003c\/td\u003e\n\u003ctd\u003eT8MPT100J20B1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eGas Furnace Ignition\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFit Type\u003c\/td\u003e\n\u003ctd\u003eOEM Direct Replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eEngineered as a direct-fit replacement for the Tempstar T8MPT100J20B1 100,000 BTU two-stage furnace and equivalent Heil\/ICP family models that share the same OEM igniter assembly. Always confirm your existing igniter part number before ordering.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety First\u003c\/strong\u003e - Shut off gas and disconnect power at the furnace switch; verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e - Remove the lower burner-compartment service panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e - Photograph the igniter bracket and wire routing before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e - Unplug the igniter harness connector and remove the mounting screw; lift the fragile element out without touching the ceramic.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e - Mount the new igniter, handling only the ceramic base, and reconnect the harness per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e - Restore gas and power, then run a heat cycle and confirm the igniter glows and the burners light.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFurnace inducer and blower run but burners never ignite.\u003c\/li\u003e\n\u003cli\u003eVisible crack, blister, or break in the igniter element.\u003c\/li\u003e\n\u003cli\u003eIgniter no longer glows during a call for heat.\u003c\/li\u003e\n\u003cli\u003eControl board flashes an ignition-failure or lockout fault code.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eShipping \u0026amp; Returns\u003c\/h3\u003e\n\u003cp\u003eShips same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.\u003c\/p\u003e","brand":"Tempstar","offers":[{"title":"Direct Replacement","offer_id":63021708542323,"sku":"1172533-GEN","price":38.0,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048454373747,"sku":"1172533","price":49.4,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-igniter-silicon-nitride-1172533_75c57972-1227-4f92-9309-5f6c51ea6620.jpg?v=1782960215","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-hot-surface-igniter-for-t8mpt100j20b1-silicon-nitride-hsi-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}