{"product_id":"carrier-ph14nb03700gaaaa-pressure-switch-1vlc9v","title":"OEM Carrier High \u0026 Low Pressure Switch Kit for PH14NB03700GAAAA","description":"\u003ch1\u003eOEM Carrier High \u0026amp; Low Pressure Switch Kit — 312926-252 \u0026amp; 312926-258 for Model PH14NB03700GAAAA\u003c\/h1\u003e\u003cp\u003eThese are the factory-specified OEM replacement pressure switches for the \u003cstrong\u003eCarrier PH14NB03700GAAAA\u003c\/strong\u003e heat pump. The \u003cstrong\u003ehigh pressure switch (312926-252, 670\/470 PSI)\u003c\/strong\u003e monitors refrigerant discharge pressure and cuts the compressor if it exceeds safe limits — protecting against catastrophic compressor failure. The \u003cstrong\u003elow pressure switch (312926-258, 55\/23 PSI)\u003c\/strong\u003e monitors suction-side pressure and shuts down the compressor under low-charge or refrigerant-starved conditions. When either switch fails, you may experience nuisance lockouts, a compressor that won't start, or a system that trips on a pressure fault code and requires manual reset.\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 | Factory Authorized Part | OEM cross-reference: LP18-094 | Manufacturer: Sensata\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 | Factory Authorized Part | OEM cross-reference: PSL 312926-258 \/ PS80-02-F1270 | Manufacturer: Sensata\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e Genuine Carrier OEM switches are calibrated to exact factory cut-in\/cut-out tolerances. Aftermarket substitutes frequently drift ±10–15 PSI, causing nuisance trips or — worse — failing to protect the compressor under true fault conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Requires recovering refrigerant before accessing refrigerant-side ports. Tools needed: manifold gauge set, wire strippers, 1\/4\" flare fittings, multimeter for continuity check. EPA 608 certification required for refrigerant handling. Always confirm system pressure before re-energizing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered as direct OEM replacements for \u003cstrong\u003eCarrier model PH14NB03700GAAAA\u003c\/strong\u003e. Verify PSI ratings on your unit's data plate or wiring diagram before ordering. Unsure which switch you need — high, low, or both? Our HVAC parts specialists confirm fitment before you buy. Order now and we'll ship today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641769906547,"sku":"CARRIE-PH14NB03700GAAAA-PRESSURE_SWITCH-312926-252","price":74.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641769939315,"sku":"CARRIE-PH14NB03700GAAAA-PRESSURE_SWITCH-312926-252-GEN","price":65.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-312926-252_6526a1e7-b1e6-4c8b-9116-5c0314cd7a89.jpg?v=1775033078","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph14nb03700gaaaa-pressure-switch-1vlc9v","provider":"National HVAC Parts","version":"1.0","type":"link"}