{"product_id":"ultra-durable-52w29-furnace-flame-sensor","title":"52W29 Furnace Flame Sensor Replacement - For Lennox Armstrong \u0026 Ducane Furnaces - 2 Pack","description":"\u003ch2\u003e52W29 Furnace Flame Sensor\u003c\/h2\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eConstructed with a metal alloy rod and a ceramic insulator for high-temperature durability and conductivity.\u003c\/li\u003e\n\u003cli\u003eDetects burner flame to allow safe and continuous furnace operation.\u003c\/li\u003e\n\u003cli\u003eRod Length: 2-3\/4 inches\u003c\/li\u003e\n\u003cli\u003eConnector Size: 3\/16 inch\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eReplaces \/ Cross-Reference Part Numbers\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cmeta charset=\"utf-8\"\u003e52W29\u003c\/li\u003e\n\u003cli\u003e52W2901\u003c\/li\u003e\n\u003cli\u003e31L71\u003c\/li\u003e\n\u003cli\u003e31L7101\u003c\/li\u003e\n\u003cli\u003eLB-74940A\u003c\/li\u003e\n\u003cli\u003e28PV41\u003c\/li\u003e\n\u003cli\u003e903600\u003c\/li\u003e\n\u003cli\u003eFLS52W29\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatibility \u0026amp; Fitment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDirect replacement for specific furnace models from Lennox, Armstrong, and Ducane.\u003c\/li\u003e\n\u003cli\u003eConfirmed fit for G40, G41, G50, and G51 series furnaces.\u003c\/li\u003e\n\u003cli\u003eVerify fitment by matching your original part number to the cross-reference list.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhen to Replace\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe furnace cycles on but the burner shuts off after a few seconds.\u003c\/li\u003e\n\u003cli\u003eThe furnace fails to produce heat or does not stay lit.\u003c\/li\u003e\n\u003cli\u003eThe ceramic insulator on the existing sensor is cracked or broken.\u003c\/li\u003e\n\u003cli\u003eThe metal rod is corroded, covered in carbon buildup, or physically damaged.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation Tips\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDisconnect all electrical power to the furnace before beginning service.\u003c\/li\u003e\n\u003cli\u003eHandle the new sensor by its ceramic base; avoid touching the metal rod with bare hands as skin oils can cause premature failure.\u003c\/li\u003e\n\u003cli\u003eEnsure the single mounting screw is secure but not overtightened to avoid cracking the ceramic.\u003c\/li\u003e\n\u003cli\u003ePosition the sensor so the metal rod is properly enveloped by the burner flame during operation.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"BlueStarsParts","offers":[{"title":"Default Title","offer_id":45844237385917,"sku":"AZ00238981","price":12.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2576\/7548\/files\/AZ00238981_1_298eafe4-91d1-47ef-92a1-e3306ef1d172.jpg?v=1765275950","url":"https:\/\/bluestarspartstrend.com\/products\/ultra-durable-52w29-furnace-flame-sensor","provider":"BlueStars Parts","version":"1.0","type":"link"}