{"product_id":"carrier-ph2pnb024000aa-pressure-switch-jria74","title":"OEM Carrier High \u0026 Low Pressure Switch Kit for PH2PNB024000AA","description":"\u003ch1\u003eOEM Carrier High \u0026amp; Low Pressure Switch Kit (HK02ZA395 + HK02ZB044) for Model PH2PNB024000AA\u003c\/h1\u003e\u003cp\u003eThis OEM pressure switch kit includes both the \u003cstrong\u003eHK02ZA395 High Pressure Switch\u003c\/strong\u003e and the \u003cstrong\u003eHK02ZB044 Low Pressure Switch\u003c\/strong\u003e — the factory-specified refrigerant safety controls for the \u003cstrong\u003eCarrier PH2PNB024000AA\u003c\/strong\u003e heat pump system. These switches continuously monitor refrigerant circuit pressure and command a system lockout or shutdown when pressures fall outside safe operating limits. When either switch fails, the system may refuse to start, short-cycle, trip an error code, or shut down entirely to protect the compressor from damage.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs — HK02ZA395 (High Pressure):\u003c\/strong\u003e Opens at 395 PSI | Closes at 295 PSI | 240 VAC | 1\/8\" NPT thread | OEM Sensata\/RCD manufactured | Factory-matched tolerances\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs — HK02ZB044 (Low Pressure):\u003c\/strong\u003e Opens at 7 PSI | Closes at 22 PSI | 24V | 50\" lead | SPST | Country of Origin: Mexico | Direct OEM replacement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e Genuine Carrier OEM switches are calibrated to exact factory cut-in\/cut-out pressures. Aftermarket alternatives frequently deviate from these setpoints, risking nuisance lockouts or — worse — allowing the compressor to run under dangerous pressure conditions and fail prematurely.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Refrigerant circuit work must be performed by an EPA 608-certified technician. Tools needed: manifold gauge set, 1\/4\" flare wrench, multimeter. Always recover refrigerant before replacing the high-pressure switch. Low-pressure switch replacement requires depressurizing the low-side circuit. Photograph all wiring before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory 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 Engineered specifically for the \u003cstrong\u003eCarrier PH2PNB024000AA\u003c\/strong\u003e heat pump. The HK02ZA395 replaces cross-reference part numbers including 312926-217, 71267D1, HK02ZA380, HK02ZA396, HK02ZA400, HK02ZA401, and HK02ZA435. Verify refrigerant type and PSI ratings on your unit's data plate before ordering. Our fitment team is available to confirm compatibility before you buy — order with confidence and receive fast same-day shipping.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641461002611,"sku":"CARRIE-PH2PNB024000AA-PRESSURE_SWITCH-HK02ZA395","price":92.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641461035379,"sku":"CARRIE-PH2PNB024000AA-PRESSURE_SWITCH-HK02ZA395-GEN","price":81.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-HK02ZA395_215006fc-2ea8-41a7-aed2-adf0ff73fd59.jpg?v=1775033141","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph2pnb024000aa-pressure-switch-jria74","provider":"National HVAC Parts","version":"1.0","type":"link"}