{"product_id":"carrier-ph4ang048000bbaa-pressure-switch-1vlc9v","title":"OEM Carrier High Pressure Switch 670-470 PSI — PH4ANG048000BBAA","description":"\u003ch1\u003eOEM Carrier High Pressure Switch 670\/470 PSI for Model PH4ANG048000BBAA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM high pressure switch (part# \u003cstrong\u003e312926-252\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier PH4ANG048000BBAA\u003c\/strong\u003e packaged heat pump unit. The high pressure switch is a critical refrigerant-circuit safety control that continuously monitors system discharge pressure. When refrigerant pressure rises above the safe operating threshold — due to a dirty condenser coil, blocked airflow, overcharge, or failed condenser fan motor — the switch opens to shut down the compressor and prevent catastrophic system damage. Common failure symptoms include nuisance high-pressure lockouts, compressor short-cycling, or fault codes indicating high-pressure trips on the system control board.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Cut-out: 670 PSI | Cut-in: 470 PSI | OEM Part# 312926-252 | Factory-certified safety control for R-410A systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM switch, factory-matched to exact cut-out and cut-in pressure setpoints for the PH4ANG048000BBAA. Aftermarket switches with off-tolerance trip points can allow unsafe pressures or cause premature nuisance trips, shortening compressor life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Refrigerant circuit work requires EPA Section 608 certification. Recover refrigerant before replacing. Tools needed: manifold gauge set, refrigerant recovery machine, adjustable wrench, leak detector. Always verify correct pressure ratings before installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered as a direct OEM replacement for the \u003cstrong\u003eCarrier PH4ANG048000BBAA\u003c\/strong\u003e 4-ton packaged heat pump. Verify your unit's data plate and existing switch pressure ratings before ordering. Our fitment team is available to confirm compatibility before you buy — same-day shipping on all in-stock orders.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641243750771,"sku":"CARRIE-PH4ANG048000BBAA-PRESSURE_SWITCH-312926-252","price":50.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641243783539,"sku":"CARRIE-PH4ANG048000BBAA-PRESSURE_SWITCH-312926-252-GEN","price":44.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-312926-252_dba0c76f-be0d-43d7-b85d-f530a1469e74.jpg?v=1775033480","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph4ang048000bbaa-pressure-switch-1vlc9v","provider":"National HVAC Parts","version":"1.0","type":"link"}