{"product_id":"carrier-ph1pna018000aaba-pressure-switch-jria74","title":"OEM Carrier High Pressure Switch 406\/300 PSI for PH1PNA018000AABA","description":"\u003ch1\u003eOEM Carrier High Pressure Switch 406\/300 PSI — HK02ZA395 for Model PH1PNA018000AABA\u003c\/h1\u003e\u003cp\u003eThe \u003cstrong\u003eCarrier HK02ZA395\u003c\/strong\u003e is the factory-specified OEM high pressure switch for the \u003cstrong\u003ePH1PNA018000AABA\u003c\/strong\u003e packaged heat pump unit. This safety switch continuously monitors refrigerant pressure on the high side of the refrigeration circuit. When system pressure exceeds the cut-out threshold, the switch opens to de-energize the compressor, protecting it from catastrophic damage caused by overcharge, blocked airflow, or a failing condenser fan. A faulty high pressure switch will often trigger nuisance high-pressure lockouts, prevent the compressor from starting, or cause the system to fault out on a pressure trip code even when actual system pressures are normal.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Opens (cut-out) at 406 PSI | Closes (cut-in) at 300 PSI | 240 VAC rated | 1\/8\" NPT male thread | Sensata PS80-03-0018 platform | Cross-reference: HK02ZA395A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier Factory Authorized Part, precision-calibrated to ±1% of rated trip point. Aftermarket switches frequently drift in setpoint, leading to either nuisance trips or, worse, failure to protect the compressor at true over-pressure conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Recover refrigerant and depressurize the system fully before removing the switch. Tools needed: manifold gauge set, adjustable wrench, refrigerant recovery machine, multimeter (to verify continuity before reinstall). Always apply thread sealant to the 1\/8\" NPT fitting — never use Teflon tape near refrigerant circuits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects in materials and workmanship. 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 as a direct OEM replacement for \u003cstrong\u003eCarrier model PH1PNA018000AABA\u003c\/strong\u003e packaged heat pump systems. Also cross-references to superseded Carrier part numbers 312926-217, 71267D1, HK02ZA380, HK02ZA396, and others — verify against your unit's data plate and service manual before ordering. Our HVAC specialists are available to confirm fitment before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641642045811,"sku":"CARRIE-PH1PNA018000AABA-PRESSURE_SWITCH-HK02ZA395","price":47.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641642078579,"sku":"CARRIE-PH1PNA018000AABA-PRESSURE_SWITCH-HK02ZA395-GEN","price":41.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-HK02ZA395_38cf9aca-4277-4e3f-a670-62148872754a.jpg?v=1775033397","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph1pna018000aaba-pressure-switch-jria74","provider":"National HVAC Parts","version":"1.0","type":"link"}