{"product_id":"oem-lennox-imc-hp1-2-control-replacement-kit-81l77","title":"OEM Lennox IMC HP1-2 Control Replacement Kit — 81L77","description":"\u003cp\u003eThe Lennox \u003cstrong\u003e81L77\u003c\/strong\u003e is a genuine OEM IMC HP1-2 Control Replacement Kit that manages heat pump operation within the Lennox Integrated Modular Control platform. This control board governs heat pump staging, defrost cycles, reversing valve operation, and compressor sequencing, coordinating heating and cooling modes for efficient, reliable performance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e When the HP1-2 control fails, you may notice the heat pump failing to switch between heating and cooling, missed or excessive defrost cycles, ice buildup on the outdoor coil, a compressor that won't stage properly, or fault codes on the IMC display. Electrical surges, moisture, and age are typical causes.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Heat pump control logic must match your Lennox equipment's defrost timing, staging thresholds, and communication protocol exactly. The genuine OEM \u003cstrong\u003e81L77\u003c\/strong\u003e is factory-configured for the IMC HP1-2 application, ensuring correct operation that aftermarket boards cannot reliably replicate. Installing the correct OEM control kit protects efficiency, prevents nuisance faults, and safeguards your Lennox warranty.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081080521075,"sku":"LNX-81L77","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-81L77.jpg?v=1783762157","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-imc-hp1-2-control-replacement-kit-81l77","provider":"National HVAC Parts","version":"1.0","type":"link"}