{"product_id":"tempstar-hot-surface-igniter-for-t8mpl100j20b1-silicon-carbide-hsi-ships-today","title":"Tempstar Hot Surface Igniter for T8MPL100J20B1 — Silicon Carbide HSI | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM hot surface igniter (HSI) is the ignition source for the Tempstar T8MPL100J20B1 gas furnace. When the thermostat calls for heat and the gas valve opens, line voltage (120V) energizes the igniter element. The element heats to roughly 2,500°F and ignites the burner gas. A cracked, eroded, or open igniter is one of the most common no-heat failures on this furnace platform. This listing covers OEM igniter assembly 1172533 (IGNITOR HSI) and the associated 1172821 ignition\/valve hardware (VR8205S snap-mount) used on this model.\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\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e1172533 (HSI), 1172821 (valve hardware)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eHot Surface Igniter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eTempstar (ICP \/ Heil family)\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\u003eElement\u003c\/td\u003e\n\u003ctd\u003eSilicon carbide\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment\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 for the Tempstar T8MPL100J20B1 modulating gas furnace and shared ICP\/Heil\/Comfortmaker chassis using the same burner assembly. Always confirm your model and serial against the unit rating plate 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 — Disconnect power at the furnace switch and breaker; verify zero voltage with a multimeter and shut off the gas.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the lower service panel to expose the burner box.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph the igniter bracket position and the two-pin connector 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 new element with bare fingers — skin oils cause hot spots and premature failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Seat the new igniter so the element sits in the burner flame path, 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 watch a full ignition cycle for a clean glow and reliable light-off.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFurnace clicks and the inducer runs but the burners never light (no-heat lockout).\u003c\/li\u003e\n\u003cli\u003eVisible cracks, blistering, or white powdery erosion on the igniter element.\u003c\/li\u003e\n\u003cli\u003eIgniter glows weakly or not at all during the ignition sequence.\u003c\/li\u003e\n\u003cli\u003eRepeated ignition lockouts requiring a power reset to clear.\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":63021776634227,"sku":"1172533-GEN","price":39.0,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048452637043,"sku":"1172533","price":50.7,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-igniter-silicon-carbide-1172533_95af5fe8-1ca1-4856-8413-39cb37f76970.jpg?v=1782960147","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-hot-surface-igniter-for-t8mpl100j20b1-silicon-carbide-hsi-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}