{"product_id":"oem-lennox-flame-sensor-69w43","title":"OEM Lennox Flame Sensor — 69W43","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e69W43\u003c\/strong\u003e flame sensor is a critical safety device that verifies a flame is actually present after your furnace attempts ignition. Using flame rectification, it sends a small signal to the control board confirming the burners have lit — if no flame is detected, the board shuts off the gas valve to prevent unburned fuel from accumulating.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e A dirty or failing \u003cstrong\u003e69W43\u003c\/strong\u003e is one of the most common causes of short cycling — the furnace lights, runs for a few seconds, then shuts down, repeating the sequence until it locks out. You may also see no heat, intermittent operation, or repeated ignition-lockout faults on the control board.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Flame sensors depend on precise placement, rod material, and electrical characteristics to generate a reliable microamp signal. The factory-original Lennox \u003cstrong\u003e69W43\u003c\/strong\u003e is built to those exact specifications, ensuring dependable flame detection and full compatibility with your ignition control. For a component central to combustion safety, OEM is the right call.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081097494899,"sku":"LNX-69W43","price":19.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-flame-sensor-straight-LNX-69W43.jpg?v=1783761038","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-flame-sensor-69w43","provider":"National HVAC Parts","version":"1.0","type":"link"}