{"product_id":"payne-pa12na030000agaa-pressure-switch-jria74","title":"OEM Payne Pressure Switch HK02ZA395 \/ HK02ZB028 — PA12NA030000AGAA","description":"\u003ch1\u003eOEM Payne High \u0026amp; Low Pressure Switch HK02ZA395 \/ HK02ZB028 for Model PA12NA030000AGAA\u003c\/h1\u003e\u003cp\u003eThis OEM pressure switch kit includes both the \u003cstrong\u003ehigh pressure switch (HK02ZA395)\u003c\/strong\u003e and \u003cstrong\u003elow pressure switch (HK02ZB028)\u003c\/strong\u003e factory-specified for the \u003cstrong\u003ePayne PA12NA030000AGAA\u003c\/strong\u003e mini-split system. Pressure switches monitor refrigerant-side pressures and send a signal to the control board to protect the compressor from operating outside safe pressure limits. When either switch fails, the system will typically refuse to start, trip into a fault lockout code, or shut down mid-cycle to prevent compressor damage.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e High-side switch — HK02ZA395 | Low-side switch — HK02ZB028 | Factory-calibrated trip points | Designed for R-410A refrigerant circuit | Spade terminal connections for direct OEM fit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM pressure switches are calibrated to the exact trip and reset pressures specified by Payne engineering. Generic substitutes often carry wider pressure tolerances, risking nuisance trips or, worse, delayed shutoff that shortens compressor life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Refrigerant circuit work requires an EPA 608-certified technician. Tools needed: manifold gauge set, torque wrench, multimeter for continuity verification. Always recover refrigerant before replacing switches; never open a live refrigerant circuit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty on both switches. Order ships same business day from our climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Both switches are factory-matched for the Payne \u003cstrong\u003ePA12NA030000AGAA\u003c\/strong\u003e mini-split system. Confirm refrigerant type (R-410A) and verify existing part numbers on your unit's data plate or control board wiring diagram before ordering. Not sure which switch you need? Our HVAC parts specialists verify fitment at no charge — contact us before you buy.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62909200335219,"sku":"PAYNE-PA12NA030000AGAA-PRESSURE_SWITCH-HK02ZA395","price":43.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909200367987,"sku":"PAYNE-PA12NA030000AGAA-PRESSURE_SWITCH-HK02ZA395-GEN","price":38.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-HK02ZA395_16cb03ae-a528-4213-b0d8-14dd4efac1d5.jpg?v=1780718543","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa12na030000agaa-pressure-switch-jria74","provider":"National HVAC Parts","version":"1.0","type":"link"}