{"product_id":"oem-lennox-integrated-modular-ddc-controller-86m71","title":"OEM Lennox Integrated Modular DDC Controller — 86M71","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e86M71\u003c\/strong\u003e is an Integrated Modular Controller (IMC) that serves as the DDC controller and interface for Lennox commercial rooftop units and packaged equipment. This board manages the unit's digital direct control functions — coordinating heating, cooling, economizer, and blower staging while communicating with building automation systems for centralized monitoring and control of your Lennox HVAC system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e A failing \u003cstrong\u003e86M71\u003c\/strong\u003e controller may cause the unit to stop responding to thermostat or BAS commands, produce erratic staging, throw communication or fault codes, lose economizer or damper control, or fail to power up entirely. Blank displays, dropped network communication, and unresponsive inputs and outputs are frequent indicators of a defective control board.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e The Lennox integrated modular controller is programmed and configured specifically for Lennox unit architecture. Installing the factory \u003cstrong\u003e86M71\u003c\/strong\u003e guarantees correct firmware, terminal mapping, and seamless integration with your existing Lennox equipment and controls. Generic or reflashed boards risk configuration mismatches and unreliable operation — always specify the genuine OEM part.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081079931251,"sku":"LNX-86M71","price":39.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-integrated-modular-ddc-controller-86m71","provider":"National HVAC Parts","version":"1.0","type":"link"}