{"product_id":"tempstar-hot-surface-igniter-for-t8mpl050b12b1-hsi-ships-today","title":"Tempstar Hot Surface Igniter for T8MPL050B12B1 — HSI | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM hot surface igniter (HSI, part #1172533) is the ignition source for your Tempstar T8MPL050B12B1 gas furnace. On each call for heat the control board sends voltage to the igniter, which glows red-hot and lights the gas as it flows from the valve. HSI elements are brittle and degrade with every thermal cycle, so they are one of the most common no-heat failure points. Symptoms of a failing igniter include a furnace that clicks and cycles but never lights, a weak or no glow at the igniter, repeated lockouts after several failed ignition attempts, or visible cracks and white-spotted scaling on the element. This listing references the OEM HSI (1172533); the related gas valve assembly (1172821, VR8205S snap-mount) is documented for the same model so you can confirm a complete ignition-circuit repair.\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\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 (ICP \/ Heil)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelated Part\u003c\/td\u003e\n\u003ctd\u003e1172821 Gas Valve (VR8205S)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFit\u003c\/td\u003e\n\u003ctd\u003eOEM Direct Replacement\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\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eDirect-fit replacement for the Tempstar T8MPL050B12B1 furnace and other ICP-family models (Heil, Comfortmaker, Arcoaire) using igniter 1172533. Verify the igniter mounting style and connector match your existing unit before installing.\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, disconnect power at the switch and breaker, and verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the burner compartment service panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph the igniter position, bracket, and wiring connector before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug the igniter lead and remove the mounting screw; handle the old element by its ceramic base only.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new HSI — never touch the silicon-nitride\/carbide element with bare fingers — and reconnect the lead 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 to confirm a strong glow and clean 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 cycles and clicks but never ignites\u003c\/li\u003e\n\u003cli\u003eWeak glow or no glow at the igniter\u003c\/li\u003e\n\u003cli\u003eRepeated ignition lockouts after multiple attempts\u003c\/li\u003e\n\u003cli\u003eVisible cracks, blistering, or white scaling on the element\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":63021777584499,"sku":"1172533-GEN","price":39.0,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048452079987,"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_94ca5b82-1f37-438e-83f8-51e1bec0f7b0.jpg?v=1782960124","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-hot-surface-igniter-for-t8mpl050b12b1-hsi-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}