{"product_id":"tempstar-hot-surface-igniter-for-t8dnl125l20b1-silicon-carbide-hsi-ships-today","title":"Tempstar Hot Surface Igniter for T8DNL125L20B1 — Silicon Carbide HSI | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM hot surface igniter (HSI), Tempstar part number 1172533, is the ignition component for the T8DNL125L20B1 gas furnace. When the thermostat calls for heat and the gas valve opens, the control board sends 120V to the igniter, which glows red-hot to light the burners. Hot surface igniters are the most common failure point in modern furnaces — the brittle silicon-carbide element cracks from repeated thermal cycling, contamination, or rough handling. A failed igniter is the usual cause of a furnace that runs the inducer and blower but never produces heat, or one that locks out after several ignition attempts.\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\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 \/ Heil \/ ICP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElement\u003c\/td\u003e\n\u003ctd\u003eSilicon Carbide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e120V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eGas Furnace Burner Ignition\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 T8DNL125L20B1 furnace. Also fits many related ICP-family models (Heil, Comfortmaker, Arcoaire) that share the 1172533 igniter assembly and bracket. 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 the gas and disconnect electrical power at the furnace switch and breaker. Verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the furnace burner-compartment service panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph the igniter's wiring connector and mounting orientation before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug the igniter harness, remove the mounting screw, and carefully withdraw the old igniter. Never touch the ceramic element with bare fingers — skin oils shorten its life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Seat the new igniter in the same position, secure the screw, 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 within a few seconds.\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 no flame or heat.\u003c\/li\u003e\n\u003cli\u003eVisible crack, blistering, or white spots on the igniter element.\u003c\/li\u003e\n\u003cli\u003eFurnace locks out after 3 ignition attempts.\u003c\/li\u003e\n\u003cli\u003eIgniter no longer glows when measured\/observed during a heat call.\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":63021777781107,"sku":"1172533-GEN","price":36.0,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048451981683,"sku":"1172533","price":46.8,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-igniter-silicon-carbide-1172533_4cd06ad3-b7da-40a3-9be6-43b7b8e7dc96.jpg?v=1782960120","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-hot-surface-igniter-for-t8dnl125l20b1-silicon-carbide-hsi-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}