{"product_id":"carrier-ph2ppb048000aa-pressure-switch-jria74","title":"OEM Carrier High Pressure Switch HK02ZA395 for PH2PPB048000AA","description":"\u003ch1\u003eOEM Carrier High Pressure Switch HK02ZA395 \/ HK02ZB044 for Model PH2PPB048000AA\u003c\/h1\u003e\u003cp\u003eThis genuine OEM high pressure switch (part number \u003cstrong\u003eHK02ZA395\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier PH2PPB048000AA\u003c\/strong\u003e packaged heat pump unit. The high pressure switch is a critical refrigerant-circuit safety device: it monitors discharge-side refrigerant pressure and opens the control circuit if pressure exceeds a safe threshold. When the switch fails or trips, the system may lock out on a high-pressure fault, short-cycle, or refuse to cool entirely — even when the refrigerant charge and airflow are normal. A secondary low-pressure switch (\u003cstrong\u003eHK02ZB044\u003c\/strong\u003e) is also specified for this model and is available as an add-on.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs — HK02ZA395 (High Pressure Switch):\u003c\/strong\u003e Opens at 395 PSI | Closes at 295 PSI | 1\/8\" NPT male thread | 240 VAC | PMAX 41 Bar | Sensata PS80 platform | Replaces legacy P\/Ns: 312926-217, 71267D1, HK02ZA380, HK02ZA396, HK02ZA400, HK02ZA401\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs — HK02ZB044 (Low Pressure Switch):\u003c\/strong\u003e Opens at 7 PSI | Closes at 22 PSI | 50\" lead wire | 24V control circuit | OEM Carrier\/Bryant\/Payne fitment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM switches are factory-calibrated to exact trip points (±2%). Aftermarket substitutes often carry wider tolerances, risking nuisance lockouts at low ambient temperatures or delayed trip under true high-pressure conditions — both of which shorten compressor life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Always recover refrigerant per EPA 608 regulations before replacing a refrigerant-circuit pressure switch. Tools needed: manifold gauge set, adjustable wrench or 1\" open-end wrench, Teflon tape or refrigerant-rated thread sealant. Restore charge and verify system pressures after installation. Not a DIY repair in most jurisdictions — licensed technician recommended.\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 by 3PM local time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered for the \u003cstrong\u003eCarrier PH2PPB048000AA\u003c\/strong\u003e packaged heat pump (4-ton, R-22 refrigerant circuit). Always verify part numbers against your unit's wiring diagram and data plate before ordering. Need help confirming fitment? Our technical team verifies compatibility before you buy — contact us today and get your system back online fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641448386931,"sku":"CARRIE-PH2PPB048000AA-PRESSURE_SWITCH-HK02ZA395","price":118.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641448419699,"sku":"CARRIE-PH2PPB048000AA-PRESSURE_SWITCH-HK02ZA395-GEN","price":104.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-HK02ZA395_12a0981d-803a-4186-8193-af0fe3a19e89.jpg?v=1775033609","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph2ppb048000aa-pressure-switch-jria74","provider":"National HVAC Parts","version":"1.0","type":"link"}