{"product_id":"oem-lennox-integrated-control-board-12l4201","title":"OEM Lennox Integrated Control Board — 12L4201","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e12L4201\u003c\/strong\u003e control board is the electronic control module at the heart of your Lennox furnace. It orchestrates the heating cycle from start to finish — powering the hot surface igniter, opening the gas valve, verifying flame with the sensor, and staging the inducer and circulating blower for safe, efficient performance in compatible Lennox models.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e A failing \u003cstrong\u003e12L4201\u003c\/strong\u003e board often causes a furnace that won't light, ignition lockouts after a few seconds, rapid short-cycling, a blower stuck on or off, or an unresponsive thermostat. Moisture intrusion, power surges, and failed relays are frequent causes, usually indicated by a flashing fault code.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Aftermarket boards can misread Lennox flame-sensing signals and disrupt critical safety timing. The OEM \u003cstrong\u003e12L4201\u003c\/strong\u003e guarantees a precise electrical and firmware match for your Lennox furnace, ensuring safe, reliable operation and protecting your equipment warranty.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081144811891,"sku":"LNX-12L4201","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-12L4201.jpg?v=1783762206","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-integrated-control-board-12l4201","provider":"National HVAC Parts","version":"1.0","type":"link"}