{"product_id":"oem-lennox-flame-sensor-79j22","title":"OEM Lennox Flame Sensor — 79J22","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e79J22\u003c\/strong\u003e flame sensor is a critical safety component that confirms the presence of a burner flame after ignition. Using flame rectification, it sends a small microamp signal to the furnace control board; if no flame is detected, the board shuts off the gas valve to prevent unburned gas from accumulating. It is built to the exact rod length, mounting, and electrical specifications of compatible Lennox furnaces.\u003c\/p\u003e\u003cp\u003eA dirty or failing flame sensor is one of the most common causes of furnace short-cycling. Typical symptoms include the burners igniting and then shutting off after a few seconds, the furnace locking out after several failed attempts, no heat on call, or a control board reporting a flame-loss fault code.\u003c\/p\u003e\u003cp\u003eOEM matters because the \u003cstrong\u003e79J22\u003c\/strong\u003e provides the correct rod material and geometry needed to generate a reliable, stable flame-rectification signal within your Lennox control board's sensing range. Generic sensors can produce weak or intermittent readings that trigger nuisance lockouts. The factory part restores dependable, safe furnace ignition and steady heat.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081095102835,"sku":"LNX-79J22","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-79J22.jpg?v=1783761040","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-flame-sensor-79j22","provider":"National HVAC Parts","version":"1.0","type":"link"}