{"product_id":"oem-lennox-flame-sensor-52w29","title":"OEM Lennox Flame Sensor — 52W29","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e52W29\u003c\/strong\u003e flame sensor is a critical safety component in your gas furnace. It uses flame rectification to confirm that the burner has actually ignited after the igniter fires. When the control board loses this signal, it shuts off the gas valve to prevent a dangerous buildup of unburned fuel, making a properly functioning sensor essential to safe, reliable heating.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e A dirty, corroded, or failing flame sensor is one of the most frequent causes of furnace short-cycling. Watch for a furnace that lights briefly then shuts off after a few seconds, repeated ignition attempts (lockout), no heat on demand, or an error code indicating flame loss. Carbon and oxide buildup on the sensor rod weaken the microamp signal over time.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e The Lennox \u003cstrong\u003e52W29\u003c\/strong\u003e is engineered to the exact rod length, alloy, and mounting geometry your control board expects, ensuring a strong, stable flame signal. Aftermarket substitutes can produce weak readings that trigger nuisance lockouts. Installing the factory-specified part restores dependable ignition sensing and protects the safety logic your Lennox system was designed around.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081103491443,"sku":"LNX-52W29","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-52W29.jpg?v=1783761034","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-flame-sensor-52w29","provider":"National HVAC Parts","version":"1.0","type":"link"}