{"product_id":"payne-pa13pr048000ahaa-pressure-switch-jria74","title":"OEM Payne Pressure Switch HK02ZA395 \/ HK02ZB028 — PA13PR048000AHAA","description":"\u003ch1\u003eOEM Payne High \u0026amp; Low Pressure Switch for Model PA13PR048000AHAA\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 PA13PR048000AHAA\u003c\/strong\u003e heat pump system. Pressure switches monitor refrigerant pressure on both the high and low sides of the refrigerant circuit, sending a safety signal to the control board to allow or interrupt operation. When either switch fails, the system will typically lock out before completing a heating or cooling cycle, often triggering a fault code and leaving you with no conditioned air.\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 plug-in connector for OEM wiring harness | Rated for R-410A refrigerant systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM Payne pressure switches are manufactured to exact factory pressure setpoints. Aftermarket substitutes frequently use imprecise trip thresholds, leading to nuisance lockouts or, worse, failure to protect the compressor from damaging pressure extremes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Refrigerant pressure switches are located in the refrigerant circuit. While electrical disconnection is straightforward, any refrigerant line work must be performed by an EPA 608-certified technician. Tools needed: multimeter for continuity testing, flathead screwdriver, needle-nose pliers. Always de-energize the unit before servicing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects in materials and workmanship. Orders ship same business day from our warehouse when placed before 3 PM local time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e These switches are direct OEM replacements for the \u003cstrong\u003ePayne PA13PR048000AHAA\u003c\/strong\u003e 4-ton R-410A heat pump split system. Always verify your existing part numbers against HK02ZA395 and HK02ZB028 on your unit's wiring diagram or data plate before ordering. If you need help confirming fitment, our HVAC parts specialists are available to verify compatibility before you buy — same-day shipping available on all in-stock OEM Payne components.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62909069459827,"sku":"PAYNE-PA13PR048000AHAA-PRESSURE_SWITCH-HK02ZA395","price":43.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909069492595,"sku":"PAYNE-PA13PR048000AHAA-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_851d9918-ff15-495f-8b76-f9146bfcbc29.jpg?v=1780718566","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa13pr048000ahaa-pressure-switch-jria74","provider":"National HVAC Parts","version":"1.0","type":"link"}