{"product_id":"carrier-ph4ang036000baaa-pressure-switch-1vlc9v","title":"OEM Carrier High Pressure Switch 670\/470 PSI — PH4ANG036000BAAA","description":"\u003ch1\u003eOEM Carrier High Pressure Switch 670\/470 PSI for Model PH4ANG036000BAAA\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM high pressure switch (part number \u003cstrong\u003e312926-252\u003c\/strong\u003e), factory-specified for the \u003cstrong\u003eCarrier PH4ANG036000BAAA\u003c\/strong\u003e packaged heat pump unit. The high pressure switch is a critical refrigerant-circuit safety device: it continuously monitors system discharge pressure and trips the compressor offline when pressure climbs above the safe cut-out threshold — preventing catastrophic compressor failure, refrigerant line rupture, or heat exchanger damage. If your unit is experiencing nuisance high-pressure lockouts, compressor short-cycling, or simply won't run after a fault code is displayed, a failed or out-of-calibration pressure switch is one of the most common culprits.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Cut-out: 670 PSI | Cut-in: 470 PSI | Refrigerant-side high-side monitoring | Factory-matched trip points per Carrier engineering tolerances\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM pressure switches are calibrated to exact PSI thresholds at the factory. Generic aftermarket switches can carry ±10–15% PSI tolerances, leading to premature trips, missed fault conditions, or unprotected compressor operation — none of which you want.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Refrigerant system work requires an EPA 608 certification. A licensed HVAC technician must recover refrigerant, swap the switch on the high-side service port, recharge, and verify operation with a manifold gauge set. Do not attempt without proper certification and equipment.\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 Designed for the Carrier \u003cstrong\u003ePH4ANG036000BAAA\u003c\/strong\u003e 3-ton packaged heat pump unit. Always verify the part number on your existing switch label and confirm model and serial number before ordering. Our team is available to verify fitment — contact us before you buy if you have any questions.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641266360691,"sku":"CARRIE-PH4ANG036000BAAA-PRESSURE_SWITCH-312926-252","price":61.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641266393459,"sku":"CARRIE-PH4ANG036000BAAA-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_5b8754d8-aad4-474d-a393-d6601e8ee102.jpg?v=1775033543","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph4ang036000baaa-pressure-switch-1vlc9v","provider":"National HVAC Parts","version":"1.0","type":"link"}