{"product_id":"oem-lennox-high-pressure-switch-55w64","title":"OEM Lennox High Pressure Switch — 55W64","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e55W64\u003c\/strong\u003e high pressure switch protects your Lennox system by monitoring discharge-side refrigerant pressure and shutting down the compressor before it reaches damaging levels. Installed on the high-pressure line, it trips at a factory-specified setpoint when pressure spikes — a common result of a dirty condenser coil, a failed condenser fan motor, an overcharged system, or obstructed airflow — then resets once safe conditions return.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e A failing \u003cstrong\u003e55W64\u003c\/strong\u003e can cause repeated high-pressure lockouts, a compressor that shuts off soon after starting, intermittent no-cool complaints, or a switch that will not reset. A shorted or stuck-closed switch eliminates overpressure protection and endangers the compressor.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Lennox calibrates the \u003cstrong\u003e55W64\u003c\/strong\u003e to precise cut-out and reset pressures matched to your unit's compressor and coil design. Aftermarket substitutes often use incorrect thresholds that cause nuisance trips or fail to protect when it counts. Choosing the authentic OEM \u003cstrong\u003e55W64\u003c\/strong\u003e ensures correct calibration, proper terminal fit, and dependable protection for your Lennox equipment.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081140617587,"sku":"LNX-55W64","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-55W64.jpg?v=1783761988","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-high-pressure-switch-55w64","provider":"National HVAC Parts","version":"1.0","type":"link"}