{"product_id":"carrier-ph4ang042000bcaa-pressure-switch-1vlc9v","title":"OEM Carrier High Pressure Switch 670\/470 PSI — PH4ANG042000BCAA","description":"\u003ch1\u003eOEM Carrier High Pressure Switch 670\/470 PSI for Model PH4ANG042000BCAA\u003c\/h1\u003e\u003cp\u003eThis OEM high pressure switch (part number \u003cstrong\u003e312926-252\u003c\/strong\u003e) is the factory-specified safety control replacement for the \u003cstrong\u003eCarrier PH4ANG042000BCAA\u003c\/strong\u003e packaged heat pump unit. The high pressure switch continuously monitors refrigerant circuit pressure and opens the control circuit — cutting the compressor — the moment system pressure exceeds the upper trip threshold. When this switch fails or trips on a fault, you'll typically see the unit locking out on a high-pressure fault code, the compressor cycling off unexpectedly, or the system shutting down entirely with no cooling or heating output. A faulty switch that fails to trip can also allow dangerously elevated pressures that damage the compressor, making timely replacement critical.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 670 PSI cut-out \/ 470 PSI cut-in | OEM trip thresholds factory-matched to Carrier specifications | Direct plug-in wiring harness | Replaces legacy part number 312926252\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM switch manufactured to exact factory trip-point tolerances. Aftermarket pressure switches can carry ±5–10% PSI variance, risking premature trips or — worse — failure to protect the compressor under true high-pressure events.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Refrigerant circuit work requires an EPA 608-certified technician. The system must be safely de-energized and refrigerant pressure relieved before replacing this switch. Tools needed: multimeter, 1\/4\" nut driver, refrigerant gauge manifold. Always confirm the root cause of high-pressure faults (dirty coils, failed fan motor, refrigerant overcharge) before replacing the switch.\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 for Carrier model \u003cstrong\u003ePH4ANG042000BCAA\u003c\/strong\u003e packaged heat pump systems. Verify your existing switch's PSI rating on the data plate or existing component label before ordering. Our parts specialists are available to confirm fitment — call or chat before you buy. \u003cstrong\u003eOrder now for same-day shipping!\u003c\/strong\u003e\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641244766579,"sku":"CARRIE-PH4ANG042000BCAA-PRESSURE_SWITCH-312926-252","price":75.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641244799347,"sku":"CARRIE-PH4ANG042000BCAA-PRESSURE_SWITCH-312926-252-GEN","price":66.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-312926-252_86bde4c1-df9c-4e3e-904e-77be18ae665a.jpg?v=1775033548","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph4ang042000bcaa-pressure-switch-1vlc9v","provider":"National HVAC Parts","version":"1.0","type":"link"}