{"product_id":"icp-hot-surface-igniter-for-wpg4304040rkb1-oem-1186861-1177663-ships-today","title":"ICP Hot Surface Igniter for WPG4304040RKB1 — OEM 1186861 \/ 1177663 | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM hot surface igniter is the direct ignition source for the ICP \/ Tempstar \/ Heil WPG4304040RKB1 packaged gas furnace. When the thermostat calls for heat, the control board energizes the igniter, which glows to roughly 2,000°F and lights the gas burners. Over thousands of heating cycles the silicon-carbide or silicon-nitride element becomes brittle and develops hairline cracks, leading to no-heat calls, delayed ignition, or the furnace locking out after several failed ignition attempts. Replacing a worn igniter restores reliable, on-demand ignition. This listing covers OEM part numbers 1186861 (control board igniter) and 1177663 (ignitor), the factory-correct components for this model.\u003c\/p\u003e\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\u003ePart Numbers\u003c\/td\u003e\n\u003ctd\u003e1186861, 1177663\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\u003eICP \/ Tempstar \/ Heil\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits Model\u003c\/td\u003e\n\u003ctd\u003eWPG4304040RKB1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eGas Furnace Ignition\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\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eEngineered as a direct-fit replacement for the ICP \/ Tempstar \/ Heil WPG4304040RKB1 packaged gas furnace. The same igniter platform is shared across many ICP-family WPG-series units; always confirm your model and OEM part number before ordering.\u003c\/p\u003e\n\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety First\u003c\/strong\u003e — Disconnect power at the unit disconnect and shut off the gas supply. Verify zero voltage with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the furnace blower\/control service panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDocument\u003c\/strong\u003e — Photograph the igniter bracket position and wire routing before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemove\u003c\/strong\u003e — Unplug the igniter connector and remove the mounting screw(s); lift the old igniter out without touching the element with bare fingers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new igniter at the same depth and angle, handling it only by the ceramic base, and reconnect the plug per your photo.\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 promptly.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFurnace blower runs but no heat is produced\u003c\/li\u003e\n\u003cli\u003eVisible cracks or breaks in the igniter element\u003c\/li\u003e\n\u003cli\u003eDelayed ignition or a soft \"poof\" at startup\u003c\/li\u003e\n\u003cli\u003eFurnace locks out after repeated failed ignition attempts\u003c\/li\u003e\n\u003c\/ul\u003e\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":"ICP","offers":[{"title":"OEM","offer_id":63021517046131,"sku":"1186861","price":44.2,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047672365427,"sku":"1186861-GEN","price":34.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-igniter-silicon-carbide-1186861_179bc1cf-00d2-47ff-86a9-8385b3a2eb65.jpg?v=1782893171","url":"https:\/\/nationalhvacparts.com\/products\/icp-hot-surface-igniter-for-wpg4304040rkb1-oem-1186861-1177663-ships-today","provider":"National HVAC Parts","version":"1.0","type":"link"}