{"product_id":"carrier-ph3ana042000bbaa-pressure-switch-1vlc9v","title":"OEM Carrier High Pressure Switch 670\/470 PSI — PH3ANA042000BBAA","description":"\u003ch1\u003eOEM Carrier High Pressure Switch 670\/470 PSI for Model PH3ANA042000BBAA\u003c\/h1\u003e\u003cp\u003eThis OEM high pressure switch (part# \u003cstrong\u003e312926-252\u003c\/strong\u003e) is the factory-specified safety control for the \u003cstrong\u003eCarrier PH3ANA042000BBAA\u003c\/strong\u003e packaged HVAC system. The high pressure switch continuously monitors refrigerant circuit pressure and opens the control circuit if pressure exceeds the safe threshold — protecting the compressor from catastrophic damage. When this switch fails or trips without resetting, you'll typically experience nuisance lockouts, a compressor that won't energize, or fault codes indicating a high-pressure trip condition. Replacing the switch with a genuine OEM part ensures the system operates within factory-engineered safety limits.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Cutout: 670 PSI | Cut-in (reset): 470 PSI | OEM Part Number: 312926-252 | Genuine Carrier factory part | Compatible with R-410A refrigerant systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine OEM Carrier switch manufactured to exact factory pressure setpoints. Aftermarket switches can carry wide pressure tolerances, potentially allowing unsafe operating conditions or nuisance trips that shorten compressor life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Refrigerant circuit must be recovered before replacing a high pressure switch on a sealed system. Tools needed: manifold gauges, refrigerant recovery unit, adjustable wrench, multimeter. EPA 608 certification required for refrigerant handling. Always confirm the switch is the root cause before replacing — check for refrigerant overcharge, dirty condenser coils, or restricted airflow first.\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 PH3ANA042000BBAA\u003c\/strong\u003e packaged unit. Verify your unit's model data plate and part number before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you purchase — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641422369139,"sku":"CARRIE-PH3ANA042000BBAA-PRESSURE_SWITCH-312926-252","price":78.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641422401907,"sku":"CARRIE-PH3ANA042000BBAA-PRESSURE_SWITCH-312926-252-GEN","price":69.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-312926-252_4b876d42-c3ca-4cd6-8951-5b25748e0b62.jpg?v=1775033541","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph3ana042000bbaa-pressure-switch-1vlc9v","provider":"National HVAC Parts","version":"1.0","type":"link"}