{"product_id":"carrier-ph14nb01800gaaaa-pressure-switch-1vlc9v","title":"OEM Carrier High \u0026 Low Pressure Switch Kit for PH14NB01800GAAAA","description":"\u003ch1\u003eOEM Carrier High \u0026amp; Low Pressure Switch Kit (312926-252 \u0026amp; 312926-258) for Model PH14NB01800GAAAA\u003c\/h1\u003e\u003cp\u003eThis factory-authorized 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 two pressure safety controls that protect the compressor in your \u003cstrong\u003eCarrier PH14NB01800GAAAA\u003c\/strong\u003e heat pump system. The high-side switch monitors refrigerant pressure and trips the compressor offline if pressure exceeds the safe upper threshold, while the low-side switch prevents the compressor from running under low-refrigerant or loss-of-charge conditions. When either switch fails, you'll typically see a system lockout, nuisance tripping, compressor fault codes, or a unit that short-cycles and shuts down within minutes of startup.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs — High Pressure Switch (312926-252):\u003c\/strong\u003e 670 PSI cut-out \/ 470 PSI cut-in | SPST normally-closed | OEM-matched wiring terminals | Factory Authorized Part\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs — Low Pressure Switch (312926-258):\u003c\/strong\u003e 55 PSI cut-out \/ 23 PSI cut-in | SPST normally-closed | Pre-wired leads | Factory Authorized Part\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM Carrier pressure switches are calibrated to exact cut-in\/cut-out tolerances at the factory. Aftermarket substitutes often carry ±10–15% pressure tolerances, risking compressor damage from under- or over-pressure operation. Always use OEM on refrigerant-side safety controls.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Refrigerant-side pressure switches require recovering system charge before replacement in most configurations. 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. Ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered for the \u003cstrong\u003eCarrier PH14NB01800GAAAA\u003c\/strong\u003e heat pump. Confirm both part numbers against your unit's wiring diagram or data plate before ordering. Not sure? Our HVAC parts specialists verify fitment before you buy — call or chat now. In stock and ready to ship today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641774657907,"sku":"CARRIE-PH14NB01800GAAAA-PRESSURE_SWITCH-312926-252","price":62.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641774690675,"sku":"CARRIE-PH14NB01800GAAAA-PRESSURE_SWITCH-312926-252-GEN","price":55.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-312926-252_fd9f99f8-078a-470a-8da1-84fd2a527946.jpg?v=1775033065","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph14nb01800gaaaa-pressure-switch-1vlc9v","provider":"National HVAC Parts","version":"1.0","type":"link"}