{"product_id":"carrier-ph2pnb030000aa-pressure-switch-jria74","title":"OEM Carrier High Pressure Switch HK02ZA395 for PH2PNB030000AA","description":"\u003ch1\u003eOEM Carrier High Pressure Switch HK02ZA395 \/ HK02ZB044 for Model PH2PNB030000AA\u003c\/h1\u003e\u003cp\u003eThis OEM high pressure switch is the factory-specified replacement for the \u003cstrong\u003eCarrier PH2PNB030000AA\u003c\/strong\u003e heat pump system. The high pressure switch (HK02ZA395) is a critical refrigerant-circuit safety device that monitors system pressure on the discharge side of the compressor. When refrigerant pressure exceeds the setpoint — due to a blocked condenser coil, failed fan motor, overcharge, or restricted airflow — this switch opens to cut power to the compressor and prevent catastrophic damage. A failed or out-of-spec switch typically triggers a \u003cstrong\u003ehigh-pressure lockout fault\u003c\/strong\u003e, causing the system to shut down and fail to restart without a manual reset. The companion low pressure switch HK02ZB044 is also listed on this unit and monitors suction-side pressure (opens at 7 PSI, closes at 22 PSI) to protect against low-refrigerant conditions.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs (HK02ZA395 — High Pressure Switch):\u003c\/strong\u003e Open setpoint: 395 PSI | Close setpoint: 295 PSI | Thread: 1\/8\" NPT | Rated: 240 VAC | Manufacturer: Sensata (PS80-03-0018) | Factory cross-references: 312926-217, 71267D1, HK02ZA380, HK02ZA396, HK02ZA400, HK02ZA401\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs (HK02ZB044 — Low Pressure Switch):\u003c\/strong\u003e Open setpoint: 7 PSI | Close setpoint: 22 PSI | Lead length: 50\" | Voltage: 24V | Country of Origin: Mexico | OEM Carrier part\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e Both switches are genuine Carrier OEM parts meeting exact factory design-life testing standards. Generic aftermarket pressure switches often carry wider pressure tolerances and shorter lead sets, increasing the risk of nuisance trips or delayed safety shutoff — neither is acceptable in a refrigerant circuit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Requires recovery of system refrigerant pressure before switch replacement per EPA Section 608 regulations. Tools needed: manifold gauge set, refrigerant recovery unit, adjustable wrench, multimeter (continuity test before install). Always verify wiring polarity and connector orientation. Recommended for licensed HVAC technicians.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Ships same business day from our warehouse on all in-stock orders placed before cutoff.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the \u003cstrong\u003eCarrier PH2PNB030000AA\u003c\/strong\u003e heat pump system. Verify your unit's data plate and current part numbers before ordering — both HK02ZA395 (high pressure) and HK02ZB044 (low pressure) are supported on this listing. Not sure which switch you need? Our HVAC parts specialists verify fitment before you order — contact us with your model and serial number.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641458938227,"sku":"CARRIE-PH2PNB030000AA-PRESSURE_SWITCH-HK02ZA395","price":95.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641458970995,"sku":"CARRIE-PH2PNB030000AA-PRESSURE_SWITCH-HK02ZA395-GEN","price":83.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-HK02ZA395_c707f1eb-4104-4499-8966-d42581869e9b.jpg?v=1775033594","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph2pnb030000aa-pressure-switch-jria74","provider":"National HVAC Parts","version":"1.0","type":"link"}