{"product_id":"oem-lennox-fan-blower-control-board-39m84","title":"OEM Lennox Fan Blower Control Board — 39M84","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e39M84\u003c\/strong\u003e fan blower control board is the electronic module that governs blower motor operation in your Lennox furnace or air handler. It manages heat and cool blower timing, fan-on and fan-off delays, and speed switching, coordinating signals between the thermostat, limit controls, and the blower motor so air moves only when the system calls for it.\u003c\/p\u003e\u003cp\u003eWhen a blower control board fails, you'll often see symptoms such as the blower not starting, running continuously, short-cycling, failing to respond to thermostat calls, or visible scorch marks and burnt relays on the board itself. Intermittent no-heat or no-cool complaints frequently trace back to a failing control board rather than the motor.\u003c\/p\u003e\u003cp\u003eChoosing the OEM Lennox \u003cstrong\u003e39M84\u003c\/strong\u003e matters because Lennox boards are calibrated to the specific relay ratings, timing curves, and connector pinouts of Lennox equipment. A generic substitute can mis-time the blower, void your warranty, or cause nuisance faults. This factory-direct replacement guarantees correct fit and rated performance for your Lennox system.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081107030387,"sku":"LNX-39M84","price":129.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-control-board-fan-LNX-39M84.jpg?v=1783760751","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-fan-blower-control-board-39m84","provider":"National HVAC Parts","version":"1.0","type":"link"}