{"product_id":"tempstar-hot-surface-igniter-for-t8mpt125j20b1-hsi-kit-ships-today","title":"Tempstar Hot Surface Igniter for T8MPT125J20B1 — HSI Kit | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis OEM hot surface igniter (part #1172533) lights the burners on your Tempstar T8MPT125J20B1 two-stage gas furnace. On each heat call, the control board energizes the igniter until it glows hot enough to ignite gas as the valve opens. This kit pairs with the matched two-stage Honeywell gas valve (part #1172822, VR8205Q) used on this platform — a complete ignition solution for hard-to-light or no-heat calls. Hot surface igniters are fragile and wear out from repeated thermal cycling, eventually cracking or failing to reach ignition temperature. The result is a furnace that runs the inducer and opens the valve but never lights, then locks out after several failed tries. This genuine OEM igniter restores the correct resistance, glow temperature, and bracket fit for your unit.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\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 (Igniter HSI)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompanion Part\u003c\/td\u003e\n\u003ctd\u003e1172822 — 2-Stage Gas Valve (Honeywell VR8205Q)\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)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003e2-Stage Furnace Ignition\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits Model\u003c\/td\u003e\n\u003ctd\u003eT8MPT125J20B1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eDesigned for the Tempstar T8MPT125J20B1 two-stage gas furnace and compatible across ICP-family furnaces (Heil, Comfortmaker, Arcoaire) that share this HSI and VR8205Q gas valve platform. Match the bracket, connector, and valve staging to your existing components before installing.\u003c\/p\u003e\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety First\u003c\/strong\u003e — Disconnect power at the furnace switch and breaker, shut off the gas, then 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 wire harness before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug the igniter connector, remove the mounting screw, and withdraw the old igniter without touching the element.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new igniter handling it only by the ceramic base, reconnect the harness, and verify burner alignment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore gas and power, run a heat call, and confirm a clean glow, ignition, and stable two-stage operation.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eInducer and gas valve cycle but burners never ignite\u003c\/li\u003e\n\u003cli\u003eCracked igniter element or no visible glow\u003c\/li\u003e\n\u003cli\u003eRepeated ignition-failure lockouts\u003c\/li\u003e\n\u003cli\u003eIntermittent ignition or short-cycling on heat calls\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eShipping \u0026amp; Returns\u003c\/h3\u003e\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":63021702185331,"sku":"1172533-GEN","price":47.0,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048454406515,"sku":"1172533","price":61.1,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-igniter-silicon-carbide-1172533_7b5eec5b-249e-45ed-8b90-ba2be1e451ad.jpg?v=1782960218","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-hot-surface-igniter-for-t8mpt125j20b1-hsi-kit-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}