{"product_id":"oem-lennox-control-board-lb-87032-73j17","title":"OEM Lennox Control Board (LB-87032) — 73J17","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e73J17\u003c\/strong\u003e control (factory reference LB-87032) is the electronic brain that coordinates the operating sequence of your Lennox HVAC system. It manages inputs from thermostats, sensors, and safety switches, then relays commands to the ignition, blower, and other components so the unit cycles safely and efficiently. As a factory-specified board, it is engineered to the exact voltage, relay, and connector layout your equipment expects.\u003c\/p\u003e\u003ch3\u003eCommon Failure Symptoms\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSystem fails to start or randomly shuts down mid-cycle\u003c\/li\u003e\n\u003cli\u003eError or fault codes on the diagnostic display\u003c\/li\u003e\n\u003cli\u003eBlower, ignition, or staging outputs not responding\u003c\/li\u003e\n\u003cli\u003eIntermittent operation, tripped safeties, or no response to the thermostat\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhy OEM Matters\u003c\/h3\u003e\u003cp\u003eAftermarket or salvaged boards frequently use different firmware, relay ratings, or pinouts that can cause nuisance faults or fail to control your system correctly. The OEM Lennox \u003cstrong\u003e73J17\u003c\/strong\u003e guarantees correct fit, verified board revision, and full compatibility with your unit's control logic — protecting the components it manages. Choosing genuine Lennox parts preserves rated performance and avoids the callbacks that come with generic substitutes.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081080291699,"sku":"LNX-73J17","price":39.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-furnace-LNX-73J17.jpg?v=1783759947","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-control-board-lb-87032-73j17","provider":"National HVAC Parts","version":"1.0","type":"link"}