{"product_id":"carrier-ph14nb02400gaaaa-pressure-switch-1vlc9v","title":"OEM Carrier High \u0026 Low Pressure Switch Kit for PH14NB02400GAAAA","description":"\u003ch1\u003eOEM Carrier High \u0026amp; Low Pressure Switch Kit — 312926-252 \u0026amp; 312926-258 for Model PH14NB02400GAAAA\u003c\/h1\u003e\u003cp\u003eThis factory-matched pair of OEM Carrier pressure switches is the direct replacement for the \u003cstrong\u003eCarrier PH14NB02400GAAAA\u003c\/strong\u003e heat pump. The \u003cstrong\u003eHigh Pressure Switch (312926-252)\u003c\/strong\u003e is rated at \u003cstrong\u003e670\/470 PSI\u003c\/strong\u003e (cut-out\/cut-in) and trips the system when refrigerant pressure exceeds safe operating limits, protecting the compressor from catastrophic over-pressure damage. The \u003cstrong\u003eLow Pressure Switch (312926-258)\u003c\/strong\u003e is rated at \u003cstrong\u003e55\/23 PSI\u003c\/strong\u003e (cut-out\/cut-in) and opens the control circuit when suction pressure drops too low — typically caused by low refrigerant charge, a restricted filter, or an iced coil. Together, these two switches serve as the first line of refrigerant-circuit defense in your heat pump.\u003c\/p\u003e\u003cp\u003eCommon failure symptoms include: system locks out shortly after startup, error codes indicating high or low pressure faults, compressor cycling on and off rapidly, or the unit refusing to run in either heating or cooling mode. A faulty pressure switch that is stuck open will prevent operation entirely; one stuck closed removes critical safety protection from your compressor.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Pressure Switch Specs:\u003c\/strong\u003e Part# 312926-252 | Cut-Out: 670 PSI | Cut-In: 470 PSI | OEM Carrier Factory Authorized Part | Replaces cross-reference LP18-094\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow Pressure Switch Specs:\u003c\/strong\u003e Part# 312926-258 | Cut-Out: 55 PSI | Cut-In: 23 PSI | OEM Carrier Factory Authorized Part | Sensata PS80-02-F1270 platform\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM pressure switches are calibrated to exact factory PSI set-points. Aftermarket alternatives frequently use wider-tolerance diaphragms that trip prematurely or fail to protect against real fault conditions — risking compressor burnout and voiding manufacturer warranties.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — System must be recovered of refrigerant before replacing refrigerant-circuit pressure switches. Tools needed: manifold gauge set, refrigerant recovery machine, adjustable wrench, wire stripper, multimeter. Licensed EPA 608 technician required for refrigerant handling. Always verify set-point ratings on the old switch before installing a replacement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty on both parts. Ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered as the factory OEM replacement for \u003cstrong\u003eCarrier model PH14NB02400GAAAA\u003c\/strong\u003e heat pump. Confirm your existing switch PSI ratings against the data plate on your unit prior to ordering. Our HVAC parts specialists are available to verify fitment before you purchase — order with confidence and get it shipped today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641774002547,"sku":"CARRIE-PH14NB02400GAAAA-PRESSURE_SWITCH-312926-252","price":77.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641774035315,"sku":"CARRIE-PH14NB02400GAAAA-PRESSURE_SWITCH-312926-252-GEN","price":68.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-312926-252_6edeecef-ea01-4ad7-8232-fce3d35fe0c0.jpg?v=1775033068","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph14nb02400gaaaa-pressure-switch-1vlc9v","provider":"National HVAC Parts","version":"1.0","type":"link"}