{"product_id":"oem-lennox-integrated-control-board-12l42","title":"OEM Lennox Integrated Control Board — 12L42","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e12L42\u003c\/strong\u003e control board is the central circuit board that manages ignition, safety monitoring, and motor timing in your Lennox furnace. It reads the thermostat call for heat, energizes the igniter and gas valve, confirms flame, and sequences the inducer and blower to keep your system heating safely and efficiently.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e Typical signs of a bad board include no ignition, repeated safety lockouts, short-cycling, a blower that won't shut off, or no reaction to thermostat commands. Burnt relays, corroded traces, and blown onboard fuses are common culprits, often flagged by the board's diagnostic LED.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Lennox control logic is tuned to the exact sensors, motors, and safety devices in your furnace. The OEM \u003cstrong\u003e12L42\u003c\/strong\u003e board provides an exact-fit replacement with correct terminals and firmware, avoiding the compatibility and safety issues common to aftermarket substitutes — and keeping your Lennox warranty intact.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081144779123,"sku":"LNX-12L42","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-12L42.jpg?v=1783762204","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-integrated-control-board-12l42","provider":"National HVAC Parts","version":"1.0","type":"link"}