{"product_id":"carrier-ph15nb04200gbaaa-pressure-switch-1vlc9v","title":"OEM Carrier High \u0026 Low Pressure Switch Kit for PH15NB04200GBAAA","description":"\u003ch1\u003eOEM Carrier High \u0026amp; Low Pressure Switch Kit — 312926-252 \u0026amp; 312926-258 for Model PH15NB04200GBAAA\u003c\/h1\u003e\u003cp\u003eThis factory-authorized 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, 55\/23 PSI)\u003c\/strong\u003e for the \u003cstrong\u003eCarrier PH15NB04200GBAAA\u003c\/strong\u003e heat pump. Together, these switches act as the refrigerant circuit's safety net: the high pressure switch opens the control circuit when refrigerant pressure exceeds safe limits, while the low pressure switch protects the compressor from running under a loss-of-charge or low-load condition. Common failure symptoms include nuisance lockouts, the unit short-cycling immediately after startup, or a fault code indicating a pressure trip with no obvious mechanical cause.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Numbers \u0026amp; Ratings:\u003c\/strong\u003e High Pressure Switch — OEM #312926-252, 670 PSI cut-out \/ 470 PSI cut-in; Low Pressure Switch — OEM #312926-258, 55 PSI cut-out \/ 23 PSI cut-in | Factory-calibrated, zero field adjustment required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e Genuine Carrier OEM switches are precision-calibrated at the factory to exact PSI thresholds. Aftermarket alternatives frequently drift ±10–15 PSI from spec, causing premature trips or — worse — failing to protect the compressor during a true overpressure event.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Refrigerant circuit work requires an EPA 608 certified technician. Recover refrigerant per EPA regulations before disconnecting any pressure switch on the high-side port. Tools needed: manifold gauge set, refrigerant recovery machine, 1\/4\" flare wrench, multimeter. Always verify system pressures after reinstallation before returning to service.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty on both switches. Ships same business day from our stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the \u003cstrong\u003eCarrier PH15NB04200GBAAA\u003c\/strong\u003e packaged heat pump. Verify your unit's data plate model number and existing switch PSI ratings before ordering — other PH15NB variants may use different pressure thresholds. Have a question about fitment? Our HVAC parts specialists confirm compatibility before you buy. \u003cstrong\u003eOrder now and ship today.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641671078259,"sku":"CARRIE-PH15NB04200GBAAA-PRESSURE_SWITCH-312926-252","price":59.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641671111027,"sku":"CARRIE-PH15NB04200GBAAA-PRESSURE_SWITCH-312926-252-GEN","price":52.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-312926-252_a4cfe2c4-4694-48a4-b12b-65ed6376a081.jpg?v=1775033126","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph15nb04200gbaaa-pressure-switch-1vlc9v","provider":"National HVAC Parts","version":"1.0","type":"link"}