{"product_id":"payne-pa10pa048000abaa-pressure-switch-jria74","title":"OEM Payne Pressure Switch High\/Low for PA10PA048000ABAA","description":"\u003ch1\u003eOEM Payne High \u0026amp; Low Pressure Switch for Model PA10PA048000ABAA\u003c\/h1\u003e\u003cp\u003eThese OEM pressure switches — \u003cstrong\u003eHK02ZA395 (High Pressure Switch)\u003c\/strong\u003e and \u003cstrong\u003eHK02ZB028 (Low Pressure Switch)\u003c\/strong\u003e — are the factory-specified replacements for the \u003cstrong\u003ePayne PA10PA048000ABAA\u003c\/strong\u003e packaged air conditioning unit. Pressure switches monitor the system's refrigerant-side pressures to protect the compressor from operating outside safe parameters. When either switch fails or trips, the control board locks out operation entirely — typically presenting as a system that powers on but never begins a cooling cycle, or one that faults immediately after startup.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e HK02ZA395 — High-side pressure switch, factory-calibrated cut-out setting | HK02ZB028 — Low-side pressure switch, factory-calibrated cut-in\/cut-out setting | Direct OEM replacements matched to R-410A operating pressures | Spade terminal connections for plug-and-play installation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM pressure switches are precision-calibrated to the exact trip points specified by Payne engineering. Generic alternatives often use broader tolerance thresholds, risking compressor operation outside safe pressure windows and voiding equipment warranties.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Refrigerant-side components require caution. Electrical disconnect is required before servicing. Tools needed: 1\/4\" nut driver, needle-nose pliers, multimeter. Photograph all wiring before disconnecting. Low-side switch replacement may require a certified HVAC technician if refrigerant access is needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty on both switches. Orders placed before cutoff ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Both switches are engineered specifically for the \u003cstrong\u003ePayne PA10PA048000ABAA\u003c\/strong\u003e 4-ton packaged air conditioning unit. Verify your existing switch part numbers (printed on the switch body label) against HK02ZA395 and HK02ZB028 before ordering to confirm the correct replacement. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you purchase — contact us today and get your unit back online fast.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62909216096627,"sku":"PAYNE-PA10PA048000ABAA-PRESSURE_SWITCH-HK02ZA395","price":43.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909216129395,"sku":"PAYNE-PA10PA048000ABAA-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_cb4dfabd-590d-42f0-a079-edc3ef74d0e9.jpg?v=1780718452","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa10pa048000abaa-pressure-switch-jria74","provider":"National HVAC Parts","version":"1.0","type":"link"}