{"product_id":"carrier-ph14na01800gaaaa-pressure-switch-1vlc9v","title":"OEM Carrier High \u0026 Low Pressure Switch Kit for PH14NA01800GAAAA","description":"\u003ch1\u003eOEM Carrier High \u0026amp; Low Pressure Switch Kit (312926-252 \/ 312926-258) for Model PH14NA01800GAAAA\u003c\/h1\u003e\u003cp\u003eThis factory-authorized OEM pressure switch kit includes both the \u003cstrong\u003e312926-252 High Pressure Switch (670\/470 PSI cut-out\/cut-in)\u003c\/strong\u003e and the \u003cstrong\u003e312926-258 Low Pressure Switch (55\/23 PSI cut-out\/cut-in)\u003c\/strong\u003e — the complete refrigerant circuit protection pair for the \u003cstrong\u003eCarrier PH14NA01800GAAAA\u003c\/strong\u003e heat pump. These switches continuously monitor refrigerant pressure on both the high and low side of the refrigerant circuit. When pressures fall outside safe operating limits — due to refrigerant loss, blocked airflow, a failing TXV, or an overcharged system — the switches open the control circuit and lock out the compressor before catastrophic damage occurs. If your PH14NA01800GAAAA is tripping on fault codes related to high-pressure lockout, low-pressure lockout, or short-cycling compressor operation, one or both of these switches is the likely culprit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Numbers:\u003c\/strong\u003e 312926-252 (High Pressure Switch, 670\/470# cut-out\/cut-in) and 312926-258 (Low Pressure Switch, 55\/23# cut-out\/cut-in) | Genuine Carrier Factory Authorized Parts (FAP)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM switches are factory-calibrated to exact setpoints. Aftermarket units often drift ±10–15% from rated pressure thresholds, risking compressor damage or nuisance lockouts that a true OEM switch would prevent.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Refrigerant circuit must be recovered before replacing pressure switches. Required tools: refrigerant recovery unit, manifold gauge set, 1\/4\" \u0026amp; 3\/8\" flare wrenches, multimeter. EPA Section 608 certification required. Always leak-test after re-installation and recharge to manufacturer specification.\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 This kit is engineered specifically for the \u003cstrong\u003eCarrier PH14NA01800GAAAA\u003c\/strong\u003e heat pump. Verify your model and serial number against your unit's data plate before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you buy — call or chat now. Order by 3PM and your parts ship today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641794154867,"sku":"CARRIE-PH14NA01800GAAAA-PRESSURE_SWITCH-312926-252","price":61.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641794187635,"sku":"CARRIE-PH14NA01800GAAAA-PRESSURE_SWITCH-312926-252-GEN","price":54.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-312926-252_8fe79396-d176-4ced-aed9-4dabb75687bc.jpg?v=1775033051","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph14na01800gaaaa-pressure-switch-1vlc9v","provider":"National HVAC Parts","version":"1.0","type":"link"}