{"product_id":"carrier-ph1zna024000abaa-pressure-switch-jria74","title":"OEM Carrier High \u0026 Low Pressure Switch Kit HK02ZA395 \/ HK02ZB044 — PH1","description":"\u003ch1\u003eOEM Carrier High \u0026amp; Low Pressure Switch HK02ZA395 \/ HK02ZB044 for Model PH1ZNA024000ABAA\u003c\/h1\u003e\u003cp\u003eThis OEM pressure switch kit contains both the \u003cstrong\u003ehigh pressure switch (HK02ZA395)\u003c\/strong\u003e and the \u003cstrong\u003elow pressure switch (HK02ZB044)\u003c\/strong\u003e — the factory-specified replacements for the \u003cstrong\u003eCarrier PH1ZNA024000ABAA\u003c\/strong\u003e heat pump system. These switches continuously monitor refrigerant-side pressures to protect the compressor from catastrophic high-side over-pressure and low-side loss-of-charge conditions. When either switch fails or trips without resetting, the system will go into protective lockout, displaying a fault code and refusing to run cooling or heating cycles until the fault is cleared.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs — High Pressure Switch (HK02ZA395):\u003c\/strong\u003e Opens at 395 PSI | Closes at 295 PSI | 1\/8\" NPT thread | 240 VAC | Sensata PS80-03-0018 platform | Replaces: 312926-217, HK02ZA380, HK02ZA396, HK02ZA400, HK02ZA401\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs — Low Pressure Switch (HK02ZB044):\u003c\/strong\u003e Opens at 7 PSI | Closes at 22 PSI | 50\" lead wire | 24V | OEM Carrier RCD | Factory-matched cut-in\/cut-out thresholds for PH1ZNA024000ABAA refrigerant circuit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM pressure switches are calibrated to exact factory trip points. Aftermarket substitutes frequently carry ±10–15% pressure tolerances, risking nuisance trips or, worse, failure to protect the compressor under genuine fault conditions — potentially voiding equipment warranties.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — System must be recovered and de-pressurized before replacing the high-side switch. Low-side switch swap is straightforward with basic hand tools. Tools needed: refrigerant manifold gauges, 1\/8\" NPT fitting wrench, wire crimpers, multimeter. Always verify both switches with a multimeter for continuity before condemning the board.\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.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered as direct OEM replacements for the \u003cstrong\u003eCarrier PH1ZNA024000ABAA\u003c\/strong\u003e heat pump. Verify refrigerant type and system tonnage on your data plate before ordering. Have a question about fitment? Our HVAC parts specialists verify compatibility before you buy — reach out via chat or phone today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641534435699,"sku":"CARRIE-PH1ZNA024000ABAA-PRESSURE_SWITCH-HK02ZA395","price":95.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641534468467,"sku":"CARRIE-PH1ZNA024000ABAA-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_46daaa32-2549-405f-8e68-1c75b6e90874.jpg?v=1775033158","url":"https:\/\/nationalhvacparts.com\/products\/carrier-ph1zna024000abaa-pressure-switch-jria74","provider":"National HVAC Parts","version":"1.0","type":"link"}