{"product_id":"tempstar-hot-surface-igniter-for-t8mpl100f20b1-hsi-gas-valve-kit-ships-today","title":"Tempstar Hot Surface Igniter for T8MPL100F20B1 — HSI \u0026 Gas Valve Kit | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM hot surface igniter (part #1172533) is the ignition source for your Tempstar T8MPL100F20B1 gas furnace, paired here with the matching VR8205S snap-on gas valve (part #1172821). On each call for heat the control board energizes the igniter, which glows white-hot to light gas at the burners. Hot surface igniters are brittle silicon-carbide or nitride elements that crack from thermal cycling, oils from bare fingers, or vibration. When the igniter fails, the draft inducer runs but the burners never light, and the furnace eventually locks out after several failed ignition attempts. Replacing the igniter together with the gas valve restores dependable, clean ignition.\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\u003eIgniter Part Number\u003c\/td\u003e\n\u003ctd\u003e1172533\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGas Valve Part Number\u003c\/td\u003e\n\u003ctd\u003e1172821 (VR8205S Snap)\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\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eDirect OEM fit for the Tempstar T8MPL100F20B1 furnace and shared across ICP-built Tempstar, Heil, Comfortmaker, and Arcoaire furnaces using the 1172533 hot surface igniter and the Honeywell VR8205S snap-mount gas valve. Confirm your igniter mounting tab and valve connector style 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 supply and disconnect furnace power, 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 bracket, gas valve wiring, and gas line connections before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug the igniter harness and unscrew the igniter, handling it only by the ceramic base; disconnect the gas line and wiring to swap the valve if replacing it.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new igniter without touching the element, then thread in the gas valve and reconnect gas and wiring per your photo.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore gas and power, watch for a clean glow and burner ignition, and leak-check all gas joints with soap solution.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInducer runs but burners never light and the furnace locks out.\u003c\/li\u003e\n\u003cli\u003eIgniter shows visible cracks or no longer glows.\u003c\/li\u003e\n\u003cli\u003eRepeated ignition retries before a successful or failed light.\u003c\/li\u003e\n\u003cli\u003eDelayed ignition with a rollout or rumble at startup.\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":63021776863603,"sku":"1172533-GEN","price":38.95,"currency_code":"USD","in_stock":true},{"title":"OEM","offer_id":63048452538739,"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_be6833ca-5a66-4ec2-8d42-6bb005a5a68c.jpg?v=1782960143","url":"https:\/\/nationalhvacparts.com\/products\/tempstar-hot-surface-igniter-for-t8mpl100f20b1-hsi-gas-valve-kit-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}