{"product_id":"carrier-ph15na030000baaa-pressure-switch-1vlc9v","title":"OEM Carrier High \u0026 Low Pressure Switch Kit for PH15NA030000BAAA","description":"\u003ch1\u003eOEM Carrier High \u0026amp; Low Pressure Switch Kit — 312926-252 \u0026amp; 312926-258 for Model PH15NA030000BAAA\u003c\/h1\u003e\u003cp\u003eThese factory OEM pressure switches are the certified replacement components for the \u003cstrong\u003eCarrier PH15NA030000BAAA\u003c\/strong\u003e heat pump. The \u003cstrong\u003ehigh pressure switch (312926-252, 670-470 PSI)\u003c\/strong\u003e monitors refrigerant discharge pressure and cuts power to the compressor if pressure exceeds safe operating limits — protecting the compressor from catastrophic failure. The \u003cstrong\u003elow pressure switch (312926-258)\u003c\/strong\u003e monitors suction-side refrigerant pressure and shuts the system down under low-charge or evaporator-freeze conditions. Together, they are the primary refrigerant circuit safety net of your heat pump. Common failure symptoms include nuisance high-pressure lockouts, fault codes on the control board, the system short-cycling, or the compressor refusing to start even after a manual reset.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Numbers:\u003c\/strong\u003e High Pressure Switch — \u003cstrong\u003e312926-252\u003c\/strong\u003e (670 open \/ 470 close PSI) | Low Pressure Switch — \u003cstrong\u003e312926-258\u003c\/strong\u003e | Both are genuine Carrier OEM factory-authorized parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM pressure switches use factory-calibrated trip points to ±2% tolerance. Aftermarket alternatives frequently drift outside spec, causing false lockouts or — more dangerously — failing to trip when refrigerant pressure is genuinely unsafe, risking compressor damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Refrigerant system work must be performed by an EPA 608-certified technician. Tools needed: manifold gauge set, recovery equipment, adjustable wrench, wire strippers, multimeter. Always verify refrigerant charge after replacing switches to rule out underlying system issues.\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 3 PM local time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered exclusively for the \u003cstrong\u003eCarrier PH15NA030000BAAA\u003c\/strong\u003e heat pump. Verify both part numbers against your unit's wiring diagram before ordering — high and low pressure switches are not interchangeable. Questions about fitment? Our HVAC parts specialists confirm compatibility before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641726194035,"sku":"CARRIE-PH15NA030000BAAA-PRESSURE_SWITCH-312926-252","price":61.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641726226803,"sku":"CARRIE-PH15NA030000BAAA-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_85868352-01ed-4666-8094-02cad38aa546.jpg?v=1775033095","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph15na030000baaa-pressure-switch-1vlc9v","provider":"National HVAC Parts","version":"1.0","type":"link"}