{"product_id":"carrier-ph14na04200gbaaa-pressure-switch-1vlc9v","title":"OEM Carrier High \u0026 Low Pressure Switch Kit for PH14NA04200GBAAA","description":"\u003ch1\u003eOEM Carrier High \u0026amp; Low Pressure Switch Set (312926-252 \u0026amp; 312926-258) for PH14NA04200GBAAA\u003c\/h1\u003e\u003cp\u003eThis factory-matched 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 for the \u003cstrong\u003eCarrier PH14NA04200GBAAA\u003c\/strong\u003e heat pump. Pressure switches are the refrigerant circuit's first line of defense — the high-side switch trips to protect the compressor from dangerously elevated head pressure, while the low-side switch detects loss of refrigerant charge or a blocked metering device. When either switch fails or sticks open, the system will typically lock out on a fault code, short-cycle, or refuse to enter cooling or heating mode entirely. Replacing both switches together eliminates diagnostic guesswork and ensures the full refrigerant protection circuit is restored to factory specification.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs — High Pressure Switch (312926-252):\u003c\/strong\u003e Cut-out 670 PSIG | Reset 470 PSIG | Factory-calibrated SPST-NC | Rated for R-410A refrigerant systems | Schrader-port connection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs — Low Pressure Switch (312926-258):\u003c\/strong\u003e Factory OEM set-points matched to Carrier PH14NA04200GBAAA refrigerant circuit | SPST-NC | Compatible with R-410A operating pressures\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e Genuine Carrier OEM switches ship pre-calibrated to exact factory cut-out and reset pressures. Aftermarket alternatives frequently carry ±10–15% pressure tolerance, risking nuisance trips or, worse, compressor damage from inadequate protection. Always use OEM on R-410A systems where head pressures can spike above 600 PSIG on hot days.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Refrigerant circuit work requires an EPA 608 certification. Recover refrigerant before disconnecting any Schrader-mounted switch. Tools needed: manifold gauge set, Schrader valve core tool, adjustable wrench, leak detector. Torque fittings to manufacturer specification to prevent refrigerant loss.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty. Both switches ship same business day from our warehouse — no split orders, no delays.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the \u003cstrong\u003eCarrier PH14NA04200GBAAA\u003c\/strong\u003e 4-ton R-410A heat pump (PH14NA series). Verify OEM part numbers 312926-252 (high) and 312926-258 (low) against your unit's service label before ordering. If you need fitment confirmed, our HVAC parts specialists are available to verify compatibility before your order ships — same-day shipping on all in-stock orders.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641779409267,"sku":"CARRIE-PH14NA04200GBAAA-PRESSURE_SWITCH-312926-252","price":61.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641779442035,"sku":"CARRIE-PH14NA04200GBAAA-PRESSURE_SWITCH-312926-252-GEN","price":53.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-312926-252_86cbdeca-36cb-4046-ad2d-2831288936d3.jpg?v=1775033055","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph14na04200gbaaa-pressure-switch-1vlc9v","provider":"National HVAC Parts","version":"1.0","type":"link"}