{"product_id":"carrier-ph3ana018000baaa-pressure-switch-1vlc9v","title":"OEM Carrier High Pressure Switch 670\/470 PSI for PH3ANA018000BAAA","description":"\u003ch1\u003eOEM Carrier High Pressure Switch 670\/470 PSI for Model PH3ANA018000BAAA\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM Carrier high pressure switch (part number \u003cstrong\u003e312926-252\u003c\/strong\u003e), factory-specified for the \u003cstrong\u003ePH3ANA018000BAAA\u003c\/strong\u003e packaged heat pump unit. The high pressure switch is a critical refrigerant-side safety control that continuously monitors system pressure. When refrigerant pressure exceeds the safe operating threshold of \u003cstrong\u003e670 PSI\u003c\/strong\u003e, the switch opens the circuit and shuts down the compressor to prevent catastrophic system damage. It automatically resets at \u003cstrong\u003e470 PSI\u003c\/strong\u003e once pressure normalizes. Common failure symptoms include nuisance high-pressure lockouts, the system short-cycling without obvious cause, or a fault code indicating a high-pressure trip on the unit's control board.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Cutout pressure: 670 PSI | Reset pressure: 470 PSI | OEM Part Number: 312926-252 | Genuine Carrier Factory Authorized Part\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a factory OEM component built to exact Carrier pressure tolerances. Aftermarket switches can drift in calibration, causing nuisance trips or — more dangerously — failing to trip at all, risking compressor burnout.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Refrigerant-side component. System must be recovered before replacement per EPA Section 608 regulations. Tools needed: manifold gauge set, refrigerant recovery unit, adjustable wrench, leak-detection solution. Licensed HVAC technician strongly recommended.\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 Verified fit for Carrier model \u003cstrong\u003ePH3ANA018000BAAA\u003c\/strong\u003e packaged heat pump. Always confirm refrigerant type and pressure ratings against your unit's data plate before ordering. Our parts specialists are available to verify fitment — contact us before you order if you have any questions.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641447108979,"sku":"CARRIE-PH3ANA018000BAAA-PRESSURE_SWITCH-312926-252","price":75.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641447141747,"sku":"CARRIE-PH3ANA018000BAAA-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_1e1de8b9-7cd1-4dee-96e8-a9b11a07df08.jpg?v=1775033511","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph3ana018000baaa-pressure-switch-1vlc9v","provider":"National HVAC Parts","version":"1.0","type":"link"}