{"product_id":"oem-lennox-pressure-switch-assembly-63w41","title":"OEM Lennox Pressure Switch Assembly — 63W41","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e63W41\u003c\/strong\u003e pressure switch assembly is a vital safety control in your Lennox gas furnace. It monitors the negative pressure produced by the inducer blower and confirms that the furnace is venting properly before the control board allows the burners to ignite. This draft-proving function guards against unsafe operation caused by a blocked vent or weak inducer.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e furnace ignites briefly then shuts off, repeated lockouts, a pressure switch error code, inducer running with no ignition, or frequent short cycling. Obstructed sensing tubing, a stuck or leaking diaphragm, and setpoint drift are the most common causes.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e the \u003cstrong\u003e63W41\u003c\/strong\u003e is factory-calibrated to the exact pressure threshold your Lennox furnace relies on. Aftermarket switches with the wrong setpoint lead to nuisance trips or fail to catch a real venting fault, compromising safety. Installing the authentic Lennox part restores precise pressure sensing, reliable ignition sequencing, and the protection your furnace was engineered to deliver.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081099166067,"sku":"LNX-63W41","price":24.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-draft-inducer-LNX-63W41.jpg?v=1783762921","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-pressure-switch-assembly-63w41","provider":"National HVAC Parts","version":"1.0","type":"link"}