{"product_id":"tempstar-hot-surface-igniter-sensor-for-t8dnl125l20a1-silicon-nitride-ships-today","title":"Tempstar Hot Surface Igniter\/Sensor for T8DNL125L20A1 — Silicon Nitride | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM hot surface igniter\/sensor, Tempstar part number 1009524, is the silicon-nitride HSP ignition component for the T8DNL125L20A1 gas furnace. Unlike older glow-bar igniters, the silicon-nitride design both ignites the burners and serves as part of the flame-proving circuit — making it tougher and more thermal-shock resistant, but still a leading furnace failure point. When it cracks or degrades, the furnace will run the inducer and blower but fail to light, or light and then lock out when flame is not confirmed.\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\u003e1009524\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eHot Surface Igniter\/Sensor (HSP)\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 Nitride\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\u003eDirect-fit replacement for the Tempstar T8DNL125L20A1 furnace and many related ICP-family models (Heil, Comfortmaker, Arcoaire) that use the 1009524 silicon-nitride igniter\/sensor kit. Verify your existing igniter part number and connector style 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 connector, routing, and mounting position before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug the harness, remove the mounting screw, and withdraw the old igniter. Handle only by the ceramic base — never touch the element.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Seat the new igniter\/sensor 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, run a heat cycle, and confirm the igniter glows, the burners light, and flame is proven without lockout.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInducer and blower run but the furnace never lights.\u003c\/li\u003e\n\u003cli\u003eFurnace lights briefly, then shuts down (flame not proven).\u003c\/li\u003e\n\u003cli\u003eVisible crack, chip, or white discoloration on the element.\u003c\/li\u003e\n\u003cli\u003eFurnace locks out after repeated ignition attempts.\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":63021777846643,"sku":"1009524-GEN","price":43.0,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048461582707,"sku":"1009524","price":55.9,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-igniter-silicon-nitride-1009524_e1cb7c8e-1bcc-4c6a-84cc-84e906b467af.jpg?v=1782960439","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-hot-surface-igniter-sensor-for-t8dnl125l20a1-silicon-nitride-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}