{"product_id":"icp-hot-surface-igniter-for-wpg4364090lkb1-furnace-ignition-ships-today-1","title":"ICP Hot Surface Igniter for WPG4364090LKB1 — Furnace Ignition | Ships Today","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003eThis OEM hot surface igniter (HSI) is the ignition source for the ICP\/Heil\/Tempstar WPG4364090LKB1 packaged gas furnace. On each call for heat, the control board energizes the igniter, which heats to roughly 1,800–2,500°F and lights the burner gas. It replaces OEM parts \u003cstrong\u003e1186861\u003c\/strong\u003e (control board igniter) and \u003cstrong\u003e1177663\u003c\/strong\u003e (ignitor). The igniter is a wear item — its silicon-carbide or silicon-nitride element becomes brittle with each heat\/cool cycle and eventually cracks or fails to reach ignition temperature. When that happens the furnace locks out and you get no heat, even though the inducer and gas valve are working normally.\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\u003eOEM Part 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 (Heil \/ Tempstar \/ Comfortmaker)\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\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eGas furnace burner ignition\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFitment\u003c\/td\u003e\n\u003ctd\u003eDirect OEM 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\u003eEngineered as a direct-fit replacement for the ICP\/Heil\/Tempstar\/Comfortmaker WPG4364090LKB1 packaged gas furnace and other units in the same family that originally shipped with OEM igniters 1186861 or 1177663. Match your existing part number and mounting bracket to confirm fit.\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 gas and disconnect electrical power. Verify zero voltage at the igniter terminals with a multimeter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccess\u003c\/strong\u003e — Remove the furnace burner\/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 harness, remove the mounting screw, and lift the old igniter out without touching the element.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall\u003c\/strong\u003e — Mount the new igniter, handling it only by the ceramic base, and reconnect the harness per your photo. Confirm proper gap\/position over the burner.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest\u003c\/strong\u003e — Restore gas and power, then run a heat cycle and verify the igniter glows and lights the burners.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSigns You Need a Replacement\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFurnace tries to ignite but never lights, then locks out\u003c\/li\u003e\n\u003cli\u003eIgniter does not glow on a call for heat\u003c\/li\u003e\n\u003cli\u003eVisible cracks, chips, or white spots on the element\u003c\/li\u003e\n\u003cli\u003eOpen circuit \/ no continuity across the igniter terminals\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":"ICP","offers":[{"title":"OEM","offer_id":63027211338099,"sku":"1186861","price":45.44,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":63047673479539,"sku":"1186861-GEN","price":34.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-igniter-silicon-carbide-1186861_e224a754-e431-459a-8241-6a6322e5492b.jpg?v=1782893214","url":"https:\/\/nationalhvacparts.com\/products\/icp-hot-surface-igniter-for-wpg4364090lkb1-furnace-ignition-ships-today-1","provider":"National HVAC Parts","version":"1.0","type":"link"}