{"product_id":"payne-pa13pr036000adaa-pressure-switch-jria74","title":"OEM Payne Pressure Switch HK02ZA395 \/ HK02ZB028 — PA13PR036000ADAA","description":"\u003ch1\u003eOEM Payne High \u0026amp; Low Pressure Switch HK02ZA395 \/ HK02ZB028 for Model PA13PR036000ADAA\u003c\/h1\u003e\u003cp\u003eThis OEM pressure switch is the factory-specified replacement for the \u003cstrong\u003ePayne PA13PR036000ADAA\u003c\/strong\u003e split-system heat pump. The pressure switch monitors refrigerant pressure on both the high and low sides of the refrigerant circuit, protecting the compressor from operating outside safe pressure limits. When either switch fails, the system will lock out on a fault code — typically presenting as a no-heating or no-cooling condition with the compressor refusing to start. A faulty pressure switch can also cause nuisance trips, short cycling, or error codes even when refrigerant charge and airflow are within spec.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Includes both OEM part numbers — \u003cstrong\u003eHK02ZA395\u003c\/strong\u003e (High Pressure Switch) and \u003cstrong\u003eHK02ZB028\u003c\/strong\u003e (Low Pressure Switch) | Factory-calibrated pressure set points for R-410A systems | Spade terminal connections | Designed for Payne PA13PR single-stage split heat pump series\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM pressure switches use factory-calibrated trip points matched to your system's design pressures. Generic aftermarket switches may trip at incorrect pressures, causing nuisance lockouts or — worse — allowing the compressor to operate outside safe limits, leading to premature failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Refrigerant system work requires an EPA 608 certified technician. Tools needed: manifold gauge set, multimeter for switch continuity testing, screwdriver set. Always recover refrigerant per EPA regulations before replacing a refrigerant-side pressure switch. Confirm which switch (high or low side) is faulty via manifold readings before ordering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects in materials and workmanship. Ships same business day from our warehouse when ordered before 3 PM local time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the \u003cstrong\u003ePayne PA13PR036000ADAA\u003c\/strong\u003e 3-ton single-stage R-410A split-system heat pump. Cross-references OEM part numbers HK02ZA395 and HK02ZB028. Verify refrigerant type and pressure switch part number on your unit's data plate before ordering. Not sure which switch you need? Our HVAC parts specialists can help confirm fitment — contact us before you order.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62909076767091,"sku":"PAYNE-PA13PR036000ADAA-PRESSURE_SWITCH-HK02ZA395","price":43.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909076799859,"sku":"PAYNE-PA13PR036000ADAA-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_d581f3c9-b911-446e-88f6-6154094c8404.jpg?v=1780718556","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa13pr036000adaa-pressure-switch-jria74","provider":"National HVAC Parts","version":"1.0","type":"link"}