{"product_id":"oem-lennox-ignition-control-board-73w45","title":"OEM Lennox Ignition Control Board — 73W45","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e73W45\u003c\/strong\u003e Ignition Control Board is the brain of your furnace's heating sequence. It manages the ignition process, sequences the draft inducer, igniter, gas valve, and blower, and continuously monitors the flame sensor and safety switches to ensure safe, reliable operation. This board is programmed and pinned specifically for compatible Lennox furnace models.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e A failing ignition control board often shows up as no ignition, short cycling, the furnace failing to start on a call for heat, blower running continuously, or diagnostic LED fault codes. Cracked solder joints, burnt relays, corroded connectors, and surge or heat damage are the usual causes of board failure.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e The OEM Lennox \u003cstrong\u003e73W45\u003c\/strong\u003e board carries the exact firmware, timing, and safety logic your furnace was certified with. Universal or aftermarket boards may not sequence components correctly or honor every safety interlock, risking nuisance lockouts or unsafe operation. Installing the factory board restores precise, code-compliant ignition control and preserves your equipment warranty.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081096020339,"sku":"LNX-73W45","price":129.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-furnace-LNX-73W45.jpg?v=1783762099","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-ignition-control-board-73w45","provider":"National HVAC Parts","version":"1.0","type":"link"}