{"product_id":"oem-lennox-ignitor-flame-sensor-assembly-13h25","title":"OEM Lennox Ignitor \u0026 Flame Sensor Assembly — 13H25","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e13H25\u003c\/strong\u003e ignitor and flame sensor assembly is responsible for lighting the burners and confirming flame presence on every heating cycle of your Lennox furnace. The hot surface ignitor heats up to ignite the gas, while the flame sensor detects the resulting flame and tells the control board it's safe to continue supplying fuel.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e When the \u003cstrong\u003e13H25\u003c\/strong\u003e goes bad, you'll often see no heat, a furnace that attempts ignition but never fires, or short cycling where the burner lights briefly and then shuts down because flame isn't confirmed. Hot surface ignitors are brittle and wear out with repeated heating, and flame sensors can foul or corrode over time.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e The \u003cstrong\u003e13H25\u003c\/strong\u003e is engineered to your furnace's exact resistance spec, mounting position, and ignition timing. Installing the factory Lennox part ensures consistent, reliable ignition and accurate flame sensing without nuisance lockouts. Lower-cost universal ignitors frequently fail early or trigger false flame faults.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081115353459,"sku":"LNX-13H25","price":29.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-igniter-silicon-carbide-LNX-13H25.jpg?v=1783762137","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-ignitor-flame-sensor-assembly-13h25","provider":"National HVAC Parts","version":"1.0","type":"link"}