{"product_id":"payne-pa13pr048000aaaa-pressure-switch-jria74","title":"OEM Payne Pressure Switch Kit for PA13PR048000AAAA — HK02ZA395 \/ HK02Z","description":"\u003ch1\u003eOEM Payne High \u0026amp; Low Pressure Switch Kit for Model PA13PR048000AAAA\u003c\/h1\u003e\u003cp\u003eThis factory-original pressure switch kit includes both the \u003cstrong\u003ehigh pressure switch (HK02ZA395)\u003c\/strong\u003e and \u003cstrong\u003elow pressure switch (HK02ZB028)\u003c\/strong\u003e designed specifically for the \u003cstrong\u003ePayne PA13PR048000AAAA\u003c\/strong\u003e packaged heat pump unit. Pressure switches monitor refrigerant-side pressures to protect the compressor from operating outside safe conditions. When either switch fails or trips erroneously, the system will lock out on a fault code — often before heating or cooling even begins — leaving you with no conditioned air and a frustrating no-start diagnosis.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e High pressure switch — HK02ZA395 | Low pressure switch — HK02ZB028 | Factory-calibrated trip points matched to R-410A refrigerant pressures | 1\/4\" Schrader-style port connections | 24V control circuit compatible\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM pressure switches are calibrated to exact factory trip thresholds. Aftermarket alternatives often carry wider tolerances that can cause nuisance lockouts or — worse — allow the compressor to run outside safe pressure ranges, risking costly compressor damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Refrigerant-side work requires EPA 608 certification to handle refrigerant safely. Electrical connections are straightforward. Tools needed: manifold gauge set, 1\/4\" nut driver, needle-nose pliers, multimeter. Always de-energize and tag out the unit before beginning work.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty on both switches. Orders ship same business day from our stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e This kit is engineered for the \u003cstrong\u003ePayne PA13PR048000AAAA\u003c\/strong\u003e 4-ton packaged heat pump unit. Always verify existing part numbers printed on your original switches against HK02ZA395 and HK02ZB028 before installing. If your unit displays a high-pressure or low-pressure fault code and refrigerant charge has been confirmed correct, these switches are your next diagnostic step. Questions about fitment? Our HVAC parts specialists verify compatibility before you order — in stock and ready to ship today.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62909071327603,"sku":"PAYNE-PA13PR048000AAAA-PRESSURE_SWITCH-HK02ZA395","price":43.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909071360371,"sku":"PAYNE-PA13PR048000AAAA-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_fd822efe-6c14-4dae-b5eb-700127146e5b.jpg?v=1780718625","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa13pr048000aaaa-pressure-switch-jria74","provider":"National HVAC Parts","version":"1.0","type":"link"}