{"product_id":"oem-lennox-scr-control-board-90a-3-phase-87w67","title":"OEM Lennox SCR Control Board 90A 3-Phase — 87W67","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e87W67\u003c\/strong\u003e (factory part 103324-09) is a 90-amp, three-phase SCR (silicon-controlled rectifier) control board that regulates electric resistance heat in compatible Lennox rooftop and packaged units. It switches power to the heating elements electronically, providing smooth staged heat output, precise supply-air temperature control, and less mechanical wear than contactor-based staging.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e A failing SCR control may leave heat stuck off or continuously energized, cause elements to cycle erratically, trip high-limit safeties, or create uneven discharge-air temperatures. Nuisance breaker trips, a burnt-electronics smell, visible scorch marks, or fault codes at the unit controller signal that the board needs replacement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Lennox engineers the \u003cstrong\u003e87W67\u003c\/strong\u003e to exact 90-amp, three-phase ratings and control-signal timing for their equipment. A genuine OEM board ensures correct gate triggering, thermal capacity, and connector fitment — protecting your heating elements and main control from the timing mismatches and premature failures common with generic substitutes. Installing OEM keeps your system within factory specifications and helps preserve warranty coverage.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081079112051,"sku":"LNX-87W67","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-87W67.jpg?v=1783763491","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-scr-control-board-90a-3-phase-87w67","provider":"National HVAC Parts","version":"1.0","type":"link"}