{"product_id":"oem-lennox-draft-inducer-blower-motor-21l90","title":"OEM Lennox Draft Inducer Blower Motor — 21L90","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e21L90\u003c\/strong\u003e draft inducer blower motor is responsible for moving combustion byproducts through the heat exchanger and out the venting system. At the beginning of every heating cycle it spins up to create negative pressure, closing the pressure switch that confirms safe draft before the burners are permitted to ignite.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e As the \u003cstrong\u003e21L90\u003c\/strong\u003e ages, worn bearings can cause loud humming, squealing, or rattling noises, and the motor may spin slowly, seize, or hum without turning. Since the furnace relies on this motor to prove venting, a failing inducer frequently shows up as a pressure-switch error, repeated ignition lockouts, or a complete no-heat condition.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Lennox engineers the 21L90 to deliver the exact draft, airflow, and RPM its combustion system and pressure switch are calibrated for. Generic replacements that fall short on airflow can fail to close the pressure switch, leading to unreliable operation and nuisance lockouts. The OEM 21L90 ensures a correct bolt-in fit, matched performance, and safe, efficient venting for compatible Lennox, Armstrong, and Ducane furnaces.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081112797555,"sku":"LNX-21L90","price":159.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-draft-inducer-LNX-21L90.jpg?v=1783760154","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-draft-inducer-blower-motor-21l90","provider":"National HVAC Parts","version":"1.0","type":"link"}