{"product_id":"tempstar-hot-surface-igniter-for-t8mpl125j20b1-hsi-furnace-ignitor-ships-today","title":"Tempstar Hot Surface Igniter for T8MPL125J20B1 — HSI Furnace Ignitor | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis OEM hot surface igniter (HSI, part #1172533) is the component that glows red-hot to light the burners on your Tempstar T8MPL125J20B1 furnace. On each heat call, the control board energizes the igniter; once it reaches ignition temperature the gas valve opens and the burners light. Hot surface igniters are the most common furnace heating failure — the brittle silicon-carbide or nitride element cracks from thermal cycling or contamination from oily fingerprints. Symptoms include the furnace blower running with no heat, a clicking gas valve that never lights, or a visible glow that is dim or absent. This combo page also references the matching OEM gas valve (part #1172821, VR8205S snap-mount) for systems needing both at once.\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)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompanion Part\u003c\/td\u003e\n\u003ctd\u003e1172821 — Gas Valve, HSI Snap, Honeywell VR8205S\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 \/ Comfortmaker)\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\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eDirect OEM fit for the Tempstar T8MPL125J20B1 gas furnace and ICP-family equipment (Heil, Comfortmaker, Arcoaire, Keeprite) that specifies igniter 1172533. Verify your furnace's existing igniter part number and connector style 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 and confirm zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the burner-compartment access panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph the igniter mounting position and wiring connector before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug the igniter harness, remove the mounting screw(s), and lift the fragile element out — never touch the new element with bare fingers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new igniter in the same orientation, reconnect the harness, and confirm it sits correctly over the burner.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore power, initiate a heat call, and confirm the igniter glows and the burners light promptly.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eBlower runs but no heat is produced\u003c\/li\u003e\n\u003cli\u003eIgniter does not glow, or glows dim\/uneven\u003c\/li\u003e\n\u003cli\u003eVisible crack or break in the igniter element\u003c\/li\u003e\n\u003cli\u003eFurnace locks out after several failed ignition attempts\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eShipping \u0026amp; Returns\u003c\/h3\u003e\u003cp\u003eShips same day on orders placed 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":63021776404851,"sku":"1172533-GEN","price":38.95,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048452735347,"sku":"1172533","price":50.64,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-igniter-silicon-carbide-1172533_f74dba34-b8f0-4225-893c-abf566b34b00.jpg?v=1782960152","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-hot-surface-igniter-for-t8mpl125j20b1-hsi-furnace-ignitor-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}