{"product_id":"carrier-ph13nb036000aaaa-pressure-switch-1vlc9v","title":"OEM Carrier High \u0026 Low Pressure Switch Kit for PH13NB036000AAAA","description":"\u003ch1\u003eOEM Carrier High \u0026amp; Low Pressure Switch Kit — 312926-252 \u0026amp; 312926-258 for Model PH13NB036000AAAA\u003c\/h1\u003e\u003cp\u003eThis OEM pressure switch kit includes both the \u003cstrong\u003e312926-252 High Pressure Switch (670\/470 PSI)\u003c\/strong\u003e and the \u003cstrong\u003e312926-258 Low Pressure Switch (55\/23 PSI)\u003c\/strong\u003e — the factory-specified refrigerant safety controls for the \u003cstrong\u003eCarrier PH13NB036000AAAA\u003c\/strong\u003e heat pump. These switches continuously monitor refrigerant circuit pressure and cut power to the compressor the instant pressure goes out of the safe operating window. A failed high pressure switch typically causes nuisance high-pressure lockouts, error codes, or a system that trips off on hot days. A failed low pressure switch causes the unit to shut down on startup or during low ambient conditions, often mimicking a refrigerant leak symptom. Replacing both switches together is best practice — if one has drifted out of calibration, the other is likely close behind.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs — High Pressure Switch (312926-252):\u003c\/strong\u003e Cut-out 670 PSI | Cut-in 470 PSI | SPST Normally Closed | Factory-calibrated for R-410A systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs — Low Pressure Switch (312926-258):\u003c\/strong\u003e Cut-out 55 PSI | Cut-in 23 PSI | SPST Normally Closed | Sensata PS80-02-F1270 platform\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM switches are factory-calibrated to exact cut-in\/cut-out PSI tolerances. Aftermarket switches frequently drift ±10–15 PSI from spec, causing nuisance trips or — worse — failing to protect the compressor during a true overpressure event. Always use OEM on R-410A systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Refrigerant circuit must be de-energized before disconnection. Tools needed: refrigerant manifold gauge set, 1\/4\" flare wrench, multimeter for continuity check, and electrical tape. A licensed HVAC technician is strongly recommended. Photograph all wiring connections before removal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty from date of purchase. Ships same business day from our warehouse stock.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered for the \u003cstrong\u003eCarrier PH13NB036000AAAA\u003c\/strong\u003e (3-ton, single-stage R-410A heat pump). Verify your unit's data plate and existing switch PSI ratings before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you purchase — contact us before ordering. \u003cstrong\u003eIn stock now — order by 3 PM local time for same-day shipping.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641918378355,"sku":"CARRIE-PH13NB036000AAAA-PRESSURE_SWITCH-312926-252","price":75.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641918411123,"sku":"CARRIE-PH13NB036000AAAA-PRESSURE_SWITCH-312926-252-GEN","price":66.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-312926-252_e8a39107-3e76-40bb-bdca-346aa63df18e.jpg?v=1775033006","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph13nb036000aaaa-pressure-switch-1vlc9v","provider":"National HVAC Parts","version":"1.0","type":"link"}