{"product_id":"carrier-ph14nb030000aaaa-pressure-switch-1vlc9v","title":"OEM Carrier High \u0026 Low Pressure Switch Kit for PH14NB030000AAAA","description":"\u003ch1\u003eOEM Carrier High \u0026amp; Low Pressure Switch Set — 312926-252 \u0026amp; 312926-258 for Model PH14NB030000AAAA\u003c\/h1\u003e\u003cp\u003eThis OEM-matched pair includes the factory-specified \u003cstrong\u003eHigh Pressure Switch (312926-252, 670\/470 PSI cutout\/reset)\u003c\/strong\u003e and \u003cstrong\u003eLow Pressure Switch (312926-258, 55\/23 PSI cutout\/reset)\u003c\/strong\u003e for the Carrier \u003cstrong\u003ePH14NB030000AAAA\u003c\/strong\u003e heat pump. Together, these refrigerant-circuit safety controls continuously monitor system pressure and interrupt compressor operation if pressure strays outside the safe operating band — protecting the compressor from catastrophic over-pressurization or low-charge damage. Symptoms of failure include nuisance lockouts, a compressor that trips on the high-pressure limit shortly after startup, or a system that trips on the low-pressure limit during mild outdoor temperatures.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs — High Pressure Switch (312926-252):\u003c\/strong\u003e 670 PSI cutout | 470 PSI auto-reset | R-410A rated | SPST normally closed | Meets EN12263 \u0026amp; EN60730-2-6 standards\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs — Low Pressure Switch (312926-258):\u003c\/strong\u003e 55 PSI cutout | 23 PSI auto-reset | R-410A rated | SPST normally closed | Factory Authorized Parts (Carrier RCD)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e These are genuine Carrier Factory Authorized Parts — not aftermarket. OEM pressure switches are factory-calibrated to exact cutout\/reset tolerances, ensuring the compressor is protected at precise thresholds. Generic units often carry wide pressure tolerances that can allow compressor damage before the switch trips.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Refrigerant circuit work. The system must be recovered or the circuit safely isolated before replacing refrigerant-side pressure switches. Tools needed: manifold gauge set, refrigerant recovery unit, torque wrench, multimeter. Installation by an EPA 608-certified technician is strongly recommended.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty. Orders placed before 3 PM ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered for the Carrier \u003cstrong\u003ePH14NB030000AAAA\u003c\/strong\u003e residential heat pump. Verify refrigerant type (R-410A) and cutout\/reset ratings against the data plate before ordering. Have questions about fitment? Our HVAC parts specialists verify compatibility before you buy — contact us before ordering.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641761157491,"sku":"CARRIE-PH14NB030000AAAA-PRESSURE_SWITCH-312926-252","price":59.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641761190259,"sku":"CARRIE-PH14NB030000AAAA-PRESSURE_SWITCH-312926-252-GEN","price":52.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-312926-252_5162360d-ab2b-4ae1-b69f-4793b4acd973.jpg?v=1775033070","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph14nb030000aaaa-pressure-switch-1vlc9v","provider":"National HVAC Parts","version":"1.0","type":"link"}