{"product_id":"tempstar-hot-surface-igniter-for-t9mpd075f12c1-silicon-nitride-hsi-ships-today","title":"Tempstar Hot Surface Igniter for T9MPD075F12C1 — Silicon Nitride HSI | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis genuine OEM hot surface igniter (HSI), part #1172533, is the ignition component for the Tempstar T9MPD075F12C1 modulating gas furnace. The igniter energizes on each heating call, glowing red-hot to ignite the gas at the burners. Hot surface igniters are the single most common furnace ignition failure: the brittle silicon-carbide\/silicon-nitride element cracks from thermal cycling, soot, or simple age. Typical failure symptoms include the furnace running its blower but producing no heat, a glow that is dim or absent through the inspection port, or the unit locking out after several failed ignition attempts. This is a direct-fit replacement that matches the original element resistance and mounting bracket — no modification required. The related gas valve (#1172821, Honeywell VR8205 series) is also used on this model; order it separately if your diagnosis points to the valve.\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\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\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e120V\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\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eEngineered for the Tempstar T9MPD075F12C1 9-Series modulating gas furnace and other ICP-family furnaces (Heil, Comfortmaker, Day \u0026amp; Night) that share this igniter assembly. Always verify your existing part number before ordering.\u003c\/p\u003e\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety First\u003c\/strong\u003e — Shut off gas and disconnect electrical power. Verify zero voltage at the furnace control 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 wiring and bracket position before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug the igniter connector and unscrew the mounting bracket. Handle the old element by the bracket only — never touch the igniter tip.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new igniter, confirming the tip sits in the correct burner-flame path without touching metal. Reconnect the plug.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore gas and power, then run a full heat cycle and confirm a strong glow and clean burner light-off.\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\u003eNo visible glow at the igniter during a heat call\u003c\/li\u003e\n\u003cli\u003eFurnace locks out after 3 ignition attempts\u003c\/li\u003e\n\u003cli\u003eVisible cracks, chips, or white discoloration on the element\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":63021680984435,"sku":"1172533-GEN","price":34.0,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048455520627,"sku":"1172533","price":44.2,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-igniter-silicon-nitride-1172533_b78b2b72-dd3c-4f3b-8194-6f5f7084c441.jpg?v=1782960261","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-hot-surface-igniter-for-t9mpd075f12c1-silicon-nitride-hsi-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}