{"product_id":"carrier-ph16na02400gacaa-pressure-switch-1vlc9v","title":"OEM Carrier Low Pressure Switch 55-23# for PH16NA02400GACAA","description":"\u003ch1\u003eOEM Carrier Low Pressure Switch 55-23# (312926-258) for Model PH16NA02400GACAA\u003c\/h1\u003e\u003cp\u003eThis OEM low pressure switch (part number \u003cstrong\u003e312926-258\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier PH16NA02400GACAA\u003c\/strong\u003e heat pump system. The low pressure switch continuously monitors refrigerant pressure on the suction side of the system. When pressure drops below the factory setpoint — due to a refrigerant leak, a restricted metering device, or an evaporator airflow issue — the switch opens and cuts power to the compressor, preventing catastrophic damage. Common failure symptoms include the system going into lockout shortly after startup, the compressor short-cycling, or the unit running but producing no cooling or heating effect.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 55-23# low pressure switch | Activation (open): 0.5\" W.C. | Deactivation (close): 0.75\" W.C. | Brass inlet connector | Precision-calibrated diaphragm | Pre-wired with color-coded leads\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM part manufactured to exact factory calibration tolerances. Generic switches often ship with imprecise setpoints, causing nuisance lockouts or — worse — failing to protect the compressor under genuinely low-pressure conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Recover system refrigerant before disconnecting the switch (EPA Section 608 required). Tools needed: refrigerant recovery unit, manifold gauge set, adjustable wrench, multimeter. Label and photograph wiring before removal. Recharge system to manufacturer spec after installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Ships same business day from our climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the \u003cstrong\u003eCarrier PH16NA02400GACAA\u003c\/strong\u003e heat pump. Verify your unit's data plate and existing switch markings before ordering. Cross-references include Sensata PS80-02-F1270 (55-23). Our parts team is available to confirm fitment before you buy — no guesswork required. Order today and get same-day shipping on all in-stock OEM parts.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641663312243,"sku":"CARRIE-PH16NA02400GACAA-PRESSURE_SWITCH-312926-258","price":74.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641663345011,"sku":"CARRIE-PH16NA02400GACAA-PRESSURE_SWITCH-312926-258-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-312926-258_99a9104c-9b71-42a6-b6d2-d0b715a48fbf.jpg?v=1775036347","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph16na02400gacaa-pressure-switch-1vlc9v","provider":"National HVAC Parts","version":"1.0","type":"link"}