{"product_id":"carrier-ph14nb036000aaaa-pressure-switch-1vlc9v","title":"OEM Carrier High \u0026 Low Pressure Switch Kit for PH14NB036000AAAA","description":"\u003ch1\u003eOEM Carrier High \u0026amp; Low Pressure Switch — 312926-252 \u0026amp; 312926-258 for Model PH14NB036000AAAA\u003c\/h1\u003e\u003cp\u003eThese are the factory-authorized OEM replacement pressure switches for the \u003cstrong\u003eCarrier PH14NB036000AAAA\u003c\/strong\u003e heat pump. The \u003cstrong\u003ehigh pressure switch (312926-252, 670\/470 PSI)\u003c\/strong\u003e monitors refrigerant discharge pressure and cuts power to the compressor the moment pressure exceeds a safe threshold, preventing catastrophic compressor failure. The \u003cstrong\u003elow pressure switch (312926-258, 55\/23 PSI)\u003c\/strong\u003e watches the suction side and shuts the compressor down if refrigerant pressure drops too low — a typical sign of a refrigerant leak or a restriction in the system. Together, these two switches form the refrigerant-side safety circuit. When either fails, the most common symptoms are a system that locks out immediately on startup, short-cycles within seconds, or throws a pressure-fault error code at the thermostat or control board.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Pressure Switch Specs:\u003c\/strong\u003e Part# 312926-252 | Cut-out: 670 PSI | Cut-in: 470 PSI | Factory-calibrated SPST normally-closed contact | OEM-matched tolerance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow Pressure Switch Specs:\u003c\/strong\u003e Part# 312926-258 | Cut-out: 55 PSI | Cut-in: 23 PSI | Factory-calibrated SPST normally-closed contact | Brass inlet connector with precision diaphragm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e Genuine Carrier OEM switches are factory-set to exact PSI trip points. Aftermarket alternatives often drift ±10–15% from spec, risking nuisance trips or — worse — failing to protect the compressor under true over-pressure conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Refrigerant system must be properly diagnosed before replacement. Tools required: manifold gauge set, multimeter (for continuity test), adjustable wrench, and safety gloves. Always recover refrigerant per EPA Section 608 before opening the refrigerant circuit. Licensed HVAC technician installation is strongly recommended.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty. Ships same business day from our warehouse when ordered before 3 PM local time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered for the Carrier \u003cstrong\u003ePH14NB036000AAAA\u003c\/strong\u003e 3-ton R-410A heat pump. Verify your unit's data plate model number and existing switch PSI ratings before ordering. Not sure it fits? Contact our parts team — we verify fitment before you buy. \u003cstrong\u003eOrder now and get same-day shipping!\u003c\/strong\u003e\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641758110067,"sku":"CARRIE-PH14NB036000AAAA-PRESSURE_SWITCH-312926-252","price":66.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641758142835,"sku":"CARRIE-PH14NB036000AAAA-PRESSURE_SWITCH-312926-252-GEN","price":58.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-312926-252_3daf52ad-eec9-45b8-8958-016bcfbc0d9d.jpg?v=1775033075","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph14nb036000aaaa-pressure-switch-1vlc9v","provider":"National HVAC Parts","version":"1.0","type":"link"}