{"product_id":"oem-lennox-scr-control-board-75a-1-phase-87w65","title":"OEM Lennox SCR Control Board 75A 1-Phase — 87W65","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e87W65\u003c\/strong\u003e (factory part 103324-07) is a 75-amp, single-phase SCR (silicon-controlled rectifier) control board used to modulate electric resistance heat in compatible Lennox rooftop and packaged units. By switching power to the heating elements electronically rather than mechanically, this control delivers smooth, staged heat output, tighter temperature control, and reduced wear on downstream components.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e When an SCR control begins to fail you may notice heating that will not turn on or off, elements that stay energized continuously, tripped high-limit switches, inconsistent supply-air temperatures, or nuisance breaker trips. Visible scorching, a burnt-electronics odor, or error codes at the unit controller are also signs the board should be replaced.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Lennox engineers the \u003cstrong\u003e87W65\u003c\/strong\u003e to exact amperage, phase, and control-signal specifications for their equipment. A genuine OEM board ensures correct gate triggering, thermal ratings, and connector fitment — protecting your heating elements and unit control from the mismatched timing and failures that generic substitutes can cause. Choosing OEM keeps your system operating within factory specifications and preserves warranty coverage.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081078980979,"sku":"LNX-87W65","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-87W65.jpg?v=1783763487","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-scr-control-board-75a-1-phase-87w65","provider":"National HVAC Parts","version":"1.0","type":"link"}