{"product_id":"tempstar-hot-surface-igniter-for-t8mpv125j20c1-hsi-with-2-stage-gas-valve-vr8205q-ships-today","title":"Tempstar Hot Surface Igniter for T8MPV125J20C1 – HSI with 2-Stage Gas Valve VR8205Q | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\u003cp\u003eThis OEM hot surface igniter (part #1172533, IGNITOR HSI) lights the burners on your Tempstar T8MPV125J20C1 two-stage gas furnace. On a call for heat, the control board energizes the igniter; it glows to ignition temperature and lights the gas as the valve opens. HSI igniters are brittle and degrade with repeated thermal cycling, eventually cracking or failing to reach temperature. Common symptoms include the inducer running and the board clicking with no flame, repeated ignition lockouts, or a visibly cracked element. A matching Honeywell two-stage hot-water\/heat gas valve, VR8205Q (part #1172822), is also referenced for this platform — confirm whether you need the igniter, the valve, or both before ordering. This is a direct-fit factory HSI replacement.\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\u003eIgniter Part 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\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelated Gas Valve\u003c\/td\u003e\n\u003ctd\u003e1172822 – VR8205Q, 2-Stage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003e2-Stage Gas Furnace Ignition\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eOEM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eCompatibility\u003c\/h3\u003e\u003cp\u003eBuilt for the Tempstar T8MPV125J20C1 two-stage gas furnace and compatible ICP\/Heil\/Comfortmaker models using the HSI igniter and VR8205Q two-stage gas valve. Match the connector, mounting bracket, 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, 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 and wiring harness before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e – Unplug the igniter connector, remove the mounting screw, and carefully lift out the old igniter (handle by the ceramic base only — never touch the element).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e – Position the new igniter so the element sits correctly in the burner flame path, secure the screw, and reconnect the harness.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e – Restore gas and power, run a heat cycle, and confirm the igniter glows and lights the burners on both stages.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eInducer runs and board clicks but burners never light\u003c\/li\u003e\n\u003cli\u003eFurnace locks out after several ignition attempts\u003c\/li\u003e\n\u003cli\u003eIgniter does not glow or glows weakly\/unevenly\u003c\/li\u003e\n\u003cli\u003eVisible crack or break in the igniter element\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":63021686292851,"sku":"1172533-GEN","price":42.0,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048455061875,"sku":"1172533","price":54.6,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-igniter-silicon-carbide-1172533_bcc296a9-1973-4677-961a-1d371405c531.jpg?v=1782960242","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-hot-surface-igniter-for-t8mpv125j20c1-hsi-with-2-stage-gas-valve-vr8205q-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}