{"product_id":"oem-lennox-pressure-switch-18m62","title":"OEM Lennox Pressure Switch — 18M62","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e18M62\u003c\/strong\u003e pressure switch is a critical safety component that confirms adequate venting airflow before your furnace's ignition sequence begins. It monitors the negative pressure created by the draft inducer and, if proper airflow is detected, closes to allow the ignition cycle to proceed. Designed as a direct factory replacement, the \u003cstrong\u003e18M62\u003c\/strong\u003e is engineered to the exact pressure tolerances your Lennox furnace requires for safe, reliable operation.\u003c\/p\u003e\u003ch3\u003eCommon Failure Symptoms\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eFurnace ignites briefly then shuts down on a lockout code\u003c\/li\u003e\n\u003cli\u003eNo ignition at all with the inducer running\u003c\/li\u003e\n\u003cli\u003eRepeated short-cycling during a heating call\u003c\/li\u003e\n\u003cli\u003eControl board reporting a pressure switch fault\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eA stuck or failed pressure switch is a common cause of no-heat calls, since the furnace will refuse to fire when it cannot verify safe venting.\u003c\/p\u003e\u003ch3\u003eWhy OEM Matters\u003c\/h3\u003e\u003cp\u003eAftermarket switches are often calibrated to generic set points that may not match your unit's specifications, leading to nuisance lockouts or, worse, bypassing a vital safety function. The OEM Lennox \u003cstrong\u003e18M62\u003c\/strong\u003e is factory-matched to the correct actuation pressure, ensuring proper fit, dependable safety operation, and the longevity you expect from your Lennox equipment.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081113780595,"sku":"LNX-18M62","price":24.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-single-LNX-18M62.jpg?v=1783763002","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-pressure-switch-18m62","provider":"National HVAC Parts","version":"1.0","type":"link"}