{"product_id":"oem-lennox-ecm-control-board-17b0034n02-y5971","title":"OEM Lennox ECM Control Board 17B0034N02 — Y5971","description":"\u003cp\u003eThe Lennox \u003cstrong\u003eY5971\u003c\/strong\u003e is an ECM (electronically commutated motor) control board, factory reference \u003cstrong\u003e17B0034N02\u003c\/strong\u003e, that drives and manages a variable-speed blower or motor in compatible Lennox air handlers and furnaces. The board translates system demand signals into precise motor speed and torque commands, enabling the quiet, energy-efficient, staged airflow that variable-speed Lennox systems are known for.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e A failing \u003cstrong\u003eY5971\u003c\/strong\u003e may cause the blower to run at the wrong speed, surge, or refuse to start, along with no airflow, intermittent operation, error or fault codes at the control, or a motor that hums but won't spin. Power surges, moisture, and normal aging are frequent causes of ECM board failure.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e ECM control boards are programmed to the exact motor and system they ship with. A genuine OEM \u003cstrong\u003eY5971\u003c\/strong\u003e ensures the correct firmware, speed tables, and connector pinout so the blower delivers rated airflow and efficiency. Generic replacements risk mismatched programming, poor comfort performance, and repeat failures — using the OEM board protects both the motor and your Lennox equipment warranty.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081079767411,"sku":"LNX-Y5971","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-Y5971.jpg?v=1783760615","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-ecm-control-board-17b0034n02-y5971","provider":"National HVAC Parts","version":"1.0","type":"link"}