{"product_id":"carrier-ph2pnb024000ab-pressure-switch-jria74","title":"OEM Carrier High \u0026 Low Pressure Switch Kit for PH2PNB024000AB","description":"\u003ch1\u003eOEM Carrier High \u0026amp; Low Pressure Switch Kit — HK02ZA395 + HK02ZB044 — for Model PH2PNB024000AB\u003c\/h1\u003e\u003cp\u003eThis OEM pressure switch kit includes both the \u003cstrong\u003ehigh pressure switch (HK02ZA395)\u003c\/strong\u003e and the \u003cstrong\u003elow pressure switch (HK02ZB044)\u003c\/strong\u003e — the exact factory-specified pair for the \u003cstrong\u003eCarrier PH2PNB024000AB\u003c\/strong\u003e heat pump. These switches act as safety sentinels in the refrigerant circuit: the high-side switch opens at \u003cstrong\u003e395 PSI\u003c\/strong\u003e and resets at 295 PSI, while the low-side switch opens at \u003cstrong\u003e7 PSI\u003c\/strong\u003e and closes at 22 PSI with a 50-inch lead. When either switch fails or trips, the system will lock out on a fault code, short-cycle, or refuse to start entirely — symptoms often misdiagnosed as compressor or control board failure.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs — HK02ZA395 (High Pressure):\u003c\/strong\u003e Open @ 395 PSI | Close @ 295 PSI | 1\/8\" NPT thread | 240 VAC | PMAX 41B | Replaces: 312926-217, HK02ZA380, HK02ZA396, HK02ZA400, HK02ZA401, HK02ZA435, HK02ZA500, HK02ZA501\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs — HK02ZB044 (Low Pressure):\u003c\/strong\u003e Open @ 7 PSI | Close @ 22 PSI | 50\" lead | 24V | Country of Origin: Mexico | Genuine OEM Carrier\/Bryant\/Payne part\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM pressure switches are factory-calibrated to exact cut-in and cut-out tolerances. Aftermarket substitutes frequently drift out of spec, causing nuisance trips or — more dangerously — failing to protect the compressor from refrigerant overcharge or loss-of-charge events.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Recover refrigerant per EPA 608 before replacing the high-side switch. Tools: manifold gauge set, 1\/8\" NPT fittings, spanner wrench, multimeter to verify continuity post-install. Always confirm system pressures are within normal operating range before closing up. Low-side switch is a straightforward swap with no refrigerant recovery required on most configurations.\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 as a direct OEM replacement for the \u003cstrong\u003eCarrier PH2PNB024000AB\u003c\/strong\u003e heat pump. Verify model data plate and existing switch PSI ratings before ordering. Not sure? Our fitment team confirms compatibility before you buy — reach out via chat or phone.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641460183411,"sku":"CARRIE-PH2PNB024000AB-PRESSURE_SWITCH-HK02ZA395","price":90.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641460216179,"sku":"CARRIE-PH2PNB024000AB-PRESSURE_SWITCH-HK02ZA395-GEN","price":79.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-HK02ZA395_edcc4273-8ce4-4d28-8d39-2df35ecd160e.jpg?v=1775033144","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph2pnb024000ab-pressure-switch-jria74","provider":"National HVAC Parts","version":"1.0","type":"link"}