{"product_id":"carrier-ph14na018000aaaa-pressure-switch-1vlc9v","title":"OEM Carrier High \u0026 Low Pressure Switch Kit for PH14NA018000AAAA","description":"\u003ch1\u003eOEM Carrier High \u0026amp; Low Pressure Switch Kit (312926-252 \/ 312926-258) for Model PH14NA018000AAAA\u003c\/h1\u003e\u003cp\u003eThis listing includes both factory OEM pressure switches for the \u003cstrong\u003eCarrier PH14NA018000AAAA\u003c\/strong\u003e heat pump: the \u003cstrong\u003e312926-252 High Pressure Switch (670\/470 PSI)\u003c\/strong\u003e and the \u003cstrong\u003e312926-258 Low Pressure Switch\u003c\/strong\u003e. These safety switches continuously monitor refrigerant circuit pressure to protect the compressor from damaging over-pressure and under-pressure conditions. When either switch trips — or fails in an open position — the system will lock out on a fault, refuse to run, or cycle erratically. Replacing both switches together is best practice whenever one is suspect, since they are subject to the same operating hours and refrigerant exposure.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Numbers:\u003c\/strong\u003e 312926-252 (High Pressure Switch, 670\/470 PSI set\/reset) | 312926-258 (Low Pressure Switch) | Factory Authorized Carrier OEM parts — no substitutions on safety-critical refrigerant controls.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e Carrier-spec pressure switches are calibrated to exact cut-out and cut-in pressures for R-410A systems. Off-brand switches often carry wider tolerances, risking nuisance trips or — worse — failing to protect the compressor at true over-pressure events.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Refrigerant circuit work must be performed by an EPA 608-certified technician. Tools needed: manifold gauge set, torque wrench, leak detector, and multimeter. Always recover refrigerant per EPA regulations before opening the refrigerant circuit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty. In-stock — ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e These switches are the direct OEM replacement for \u003cstrong\u003eCarrier PH14NA018000AAAA\u003c\/strong\u003e heat pump units. Always verify refrigerant type (R-410A) and pressure ratings on your unit's data plate before installation. Our fitment team is available to confirm compatibility before you order — no guesswork.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641799627123,"sku":"CARRIE-PH14NA018000AAAA-PRESSURE_SWITCH-312926-252","price":61.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641799659891,"sku":"CARRIE-PH14NA018000AAAA-PRESSURE_SWITCH-312926-252-GEN","price":54.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-312926-252_a9c2519a-2c9f-45c9-b2cf-bcf6f5dfb3d1.jpg?v=1775033048","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph14na018000aaaa-pressure-switch-1vlc9v","provider":"National HVAC Parts","version":"1.0","type":"link"}