{"product_id":"carrier-ph15nb03000gbaaa-pressure-switch-1vlc9v","title":"OEM Carrier High \u0026 Low Pressure Switch Kit for PH15NB03000GBAAA","description":"\u003ch1\u003eOEM Carrier High \u0026amp; Low Pressure Switch Kit (312926-252 \/ 312926-258) for Model PH15NB03000GBAAA\u003c\/h1\u003e\u003cp\u003eThis OEM pressure switch kit includes both the \u003cstrong\u003ehigh-pressure switch (312926-252, 670\/470 PSI)\u003c\/strong\u003e and the \u003cstrong\u003elow-pressure switch (312926-258)\u003c\/strong\u003e — the two factory-specified refrigerant safety controls for the \u003cstrong\u003eCarrier PH15NB03000GBAAA\u003c\/strong\u003e heat pump. These switches continuously monitor system refrigerant pressure and send a signal to the control board to shut down the compressor if pressure falls outside safe operating limits. A failed high-pressure switch typically causes nuisance lockout on hot days or after refrigerant overcharge; a failed low-pressure switch causes shutdown during low ambient operation or after a refrigerant leak. Both conditions present as a system that starts and then immediately trips off — often with a fault code pointing to high- or low-pressure lockout.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs — High Pressure Switch (312926-252):\u003c\/strong\u003e Cut-out 670 PSI | Reset 470 PSI | SPST normally closed | Factory-calibrated setpoints | OEM part for Carrier PH15NB03000GBAAA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs — Low Pressure Switch (312926-258):\u003c\/strong\u003e Factory-matched cut-in\/cut-out setpoints | SPST normally closed | Designed to work in tandem with 312926-252 on the same refrigerant circuit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e Genuine Carrier OEM switches are calibrated to exact factory PSI setpoints. Off-brand alternatives often carry ±5–10% pressure tolerance variation, which can allow unsafe operating pressures that void compressor warranties and risk system damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Requires EPA 608 certification to handle refrigerant. Tools needed: manifold gauge set, adjustable wrench, wire connectors, multimeter. Always recover refrigerant before replacing switches on the high-side port. Photograph all wiring before disconnection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty. Ships same business day from our warehouse when ordered before cutoff.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered as factory replacements for the \u003cstrong\u003eCarrier PH15NB03000GBAAA\u003c\/strong\u003e heat pump. Verify your unit's existing switch PSI ratings against the data plate before ordering — some production variants may use alternate setpoint switches. Our fitment team is available to confirm compatibility before you buy. Order today and receive same-day shipping on in-stock inventory.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641674748275,"sku":"CARRIE-PH15NB03000GBAAA-PRESSURE_SWITCH-312926-252","price":61.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641674781043,"sku":"CARRIE-PH15NB03000GBAAA-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_3cb55dad-a752-4e31-b1da-8b217429f5bb.jpg?v=1775033116","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph15nb03000gbaaa-pressure-switch-1vlc9v","provider":"National HVAC Parts","version":"1.0","type":"link"}