{"product_id":"oem-lennox-high-pressure-switch-10u40","title":"OEM Lennox High Pressure Switch — 10U40","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e10U40\u003c\/strong\u003e high pressure switch is a vital safety control that monitors refrigerant pressure on the discharge side of your Lennox air conditioner or heat pump. When system pressure climbs above a safe limit — commonly caused by a dirty condenser coil, a failing condenser fan, blocked airflow, or an overcharge — this switch opens the circuit and shuts down the compressor to prevent damage and dangerous overpressure conditions. It is calibrated to the exact cut-out and reset settings your Lennox system requires.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms\u003c\/strong\u003e include a compressor that trips off under load, repeated high-pressure lockouts, short cycling, or an outdoor unit that shuts down during hot weather. A faulty switch may trip prematurely and interrupt cooling, or fail to open and leave the compressor exposed to harmful pressures.\u003c\/p\u003e\u003cp\u003eSelecting the OEM Lennox \u003cstrong\u003e10U40\u003c\/strong\u003e matters because generic switches often carry incorrect pressure thresholds that lead to nuisance trips or inadequate protection. This factory-calibrated part ensures precise pressure settings, correct terminals, and reliable performance that safeguards your compressor and keeps your Lennox equipment running as engineered.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081136488819,"sku":"LNX-10U40","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-10U40.jpg?v=1783761976","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-high-pressure-switch-10u40","provider":"National HVAC Parts","version":"1.0","type":"link"}