{"product_id":"lennox-52w29-flame-sensor","title":"Lennox 52W29 Flame Sensor Kit LB-74940A","description":"\u003cp\u003eThe \u003cstrong\u003eLennox 52W29 Flame Sensor Kit LB-74940A\u003c\/strong\u003e is a Lennox flame sensor for HVAC repair and replacement work. Use it when the part number \u003cstrong\u003e52W29\u003c\/strong\u003e and the listed specifications match the equipment being serviced.\u003c\/p\u003e\n\u003cp\u003eLennox 52W29 Flame Sensor Kit (LB-74940A) is an OEM flame sensing kit used on selected Lennox gas furnaces to monitor burner flame presence and allow the control board to safely prove flame during operation. Key Features: • OEM Lennox flame sensor kit, part number 52W29 (LB-74940A) • Designed to detect burner flame and signal the furnace control board • Includes flame sensor assembly and associated hardware as supplied in the kit • Replacement part matched to specific Lennox furnace models listed in Lennox documentation Compatibility \u0026amp; Applications: • Intended for use on Lennox gas furnaces that specify 52W29 \/ LB-74940A in the official…\u003c\/p\u003e\n\u003ch3\u003eKey Specs\u003c\/h3\u003e\n\u003cul\u003e\u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Flame Sensor\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch3\u003eFitment Notes\u003c\/h3\u003e\u003cp\u003eCaptured equipment fit data references models including G40DF-24A-045-3, G40DF-24A-045-7, G40DF-24A-045-9, G40DF-24A-045X-2, G40DF-36A-045-14, G40DF-36A-070-2, G40DF-36A-070-5, G40DF-36A-070-6, G40DF-36B-090-10, G40DF-36B-090-11, G40DF-36B-090-14, G40DF-36B-090-2. Verify the complete unit model and service manual before installation.\u003c\/p\u003e\n\u003ch3\u003eExpert Verdict\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eReviewed by the SuperArbor Pro Desk:\u003c\/strong\u003e choose this part when the existing component label and unit documentation match 52W29 and the spec set above. It is best suited for targeted HVAC service repairs where exact fitment matters more than broad universal compatibility.\u003c\/p\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\u003ch4\u003eWhat is the Lennox 52W29 used for?\u003c\/h4\u003e\u003cp\u003eIt is a flame sensor for compatible Lennox HVAC equipment. Match the part number 52W29 and the equipment service literature before ordering or installing.\u003c\/p\u003e\u003ch4\u003eWhich specs should I verify before purchase?\u003c\/h4\u003e\u003cp\u003eVerify the spec set shown for this part: Product Type: Flame Sensor. The replacement should match the existing component and the unit documentation.\u003c\/p\u003e\u003ch4\u003eHow do I confirm this is the right replacement?\u003c\/h4\u003e\u003cp\u003eCompare the part number 52W29, the flame sensor description, and any unit model references with the original component and the service manual.\u003c\/p\u003e\u003ch4\u003eWhich equipment models are referenced in the fit data?\u003c\/h4\u003e\u003cp\u003eCaptured fit data references models such as G40DF-24A-045-3, G40DF-24A-045-7, G40DF-24A-045-9, G40DF-24A-045X-2, G40DF-36A-045-14, G40DF-36A-070-2. Treat this as a fitment aid and verify the complete model list in the equipment documentation.\u003c\/p\u003e\u003ch4\u003eWho should install this HVAC component?\u003c\/h4\u003e\u003cp\u003eA qualified HVAC technician should install and test the flame sensor. Disconnect power first, follow lockout procedures, and confirm safe operation after replacement.\u003c\/p\u003e\n\n\u003ch3\u003eSafety and Installation Notes\u003c\/h3\u003e\n\u003cp\u003eDisconnect power before service. HVAC electrical and combustion-related components should be installed and tested by a qualified technician. After installation, confirm wiring, mounting, airflow or fluid routing as applicable, and normal system operation.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":53095269761391,"sku":"52W29","price":16.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0830\/3499\/7051\/files\/52w29-rehost-5316dfc2.jpg?v=1780967683","url":"https:\/\/superarbor.io\/products\/lennox-52w29-flame-sensor","provider":"Super Arbor","version":"1.0","type":"link"}