{"product_id":"oem-lennox-dual-pressure-switch-assembly-63w40","title":"OEM Lennox Dual Pressure Switch Assembly — 63W40","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e63W40\u003c\/strong\u003e dual pressure switch assembly is a critical safety component that monitors both the high-side and low-side refrigerant pressures in your Lennox HVAC system. When pressures move outside of safe operating limits — whether from a refrigerant leak, a dirty coil, a failing compressor, or a blocked line — the switch opens and shuts down the compressor to prevent catastrophic damage. This assembly combines both the high-pressure and low-pressure functions into a single, factory-calibrated unit designed to protect your equipment and your investment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms\u003c\/strong\u003e include a system that trips off intermittently, a compressor that will not start, nuisance lockouts on control boards, or an outdoor unit that runs only briefly before cutting out. A pressure switch stuck open will prevent operation entirely, while one stuck closed removes an essential layer of protection from your system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Lennox pressure switches are calibrated to specific cut-out and cut-in pressures matched to your unit's refrigerant charge and design. Generic aftermarket switches often trip at the wrong thresholds, causing false shutdowns or — worse — failing to protect the compressor. Installing the authentic Lennox \u003cstrong\u003e63W40\u003c\/strong\u003e guarantees correct calibration, proper fit, and full compatibility with your system.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081099198835,"sku":"LNX-63W40","price":24.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-dual-LNX-63W40.jpg?v=1783760312","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-dual-pressure-switch-assembly-63w40","provider":"National HVAC Parts","version":"1.0","type":"link"}