{"product_id":"payne-pa13nr03000gaeaa-pressure-switch-jria74","title":"OEM Payne Pressure Switch High\/Low for PA13NR03000GAEAA","description":"\u003ch1\u003eOEM Payne High \u0026amp; Low Pressure Switch for Model PA13NR03000GAEAA\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 PA13NR03000GAEAA\u003c\/strong\u003e split-system heat pump. Pressure switches monitor refrigerant circuit pressures on both the high and low sides to protect the compressor from operating outside safe pressure limits. When either switch fails or trips, the system will lock out, preventing compressor operation and leaving you with no heating or cooling. Common symptoms include the system short-cycling, failing to start entirely, or triggering a fault code on your thermostat or control board.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e HK02ZA395 — High Side Pressure Switch | HK02ZB028 — Low Side Pressure Switch | Factory-calibrated trip points | Direct OEM replacement for Payne PA13NR03000GAEAA heat pump systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM pressure switches are calibrated to exact factory trip-point specifications, ensuring reliable compressor protection. Generic substitutes often carry wider pressure tolerances, risking nuisance trips or — worse — allowing the compressor to run outside safe operating limits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Refrigerant circuit work may require an EPA 608-certified technician. Tools needed: manifold gauge set, multimeter, flat-head screwdriver, and needle-nose pliers. Always recover refrigerant per EPA regulations before replacing pressure switches on the refrigerant lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty on both HK02ZA395 and HK02ZB028. Orders ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the \u003cstrong\u003ePayne PA13NR03000GAEAA\u003c\/strong\u003e split-system heat pump. Verify your existing switch part numbers (HK02ZA395 or HK02ZB028) against your unit's data plate and wiring diagram before ordering. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you buy — contact us today and get your system back up and running fast.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62909122281843,"sku":"PAYNE-PA13NR03000GAEAA-PRESSURE_SWITCH-HK02ZA395","price":43.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909122314611,"sku":"PAYNE-PA13NR03000GAEAA-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_9a1a20ea-1bee-43cf-ac45-1350400dc9e4.jpg?v=1780718489","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa13nr03000gaeaa-pressure-switch-jria74","provider":"National HVAC Parts","version":"1.0","type":"link"}