{"product_id":"payne-pa13nr04200gahaa-pressure-switch-jria74","title":"OEM Payne Pressure Switch HK02ZA395 \/ HK02ZB028 — PA13NR04200GAHAA","description":"\u003ch1\u003eOEM Payne High \u0026amp; Low Pressure Switch for Model PA13NR04200GAHAA\u003c\/h1\u003e\u003cp\u003eThis OEM pressure switch — available as the \u003cstrong\u003ehigh pressure switch (HK02ZA395)\u003c\/strong\u003e or \u003cstrong\u003elow pressure switch (HK02ZB028)\u003c\/strong\u003e — is the factory-specified replacement for the \u003cstrong\u003ePayne PA13NR04200GAHAA\u003c\/strong\u003e split-system heat pump. The pressure switch monitors refrigerant pressure on the high and low sides of the refrigerant circuit to protect the compressor from operating outside safe pressure limits. When either switch fails or trips, the system will lock out and refuse to run — protecting expensive components but leaving you without heating or cooling until the fault is resolved.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e High Pressure Switch (HK02ZA395) — monitors high-side refrigerant circuit | Low Pressure Switch (HK02ZB028) — monitors low-side refrigerant circuit | Factory-calibrated trip points | Direct OEM replacement, no modification required\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 for the PA13NR04200GAHAA refrigerant circuit. Generic alternatives may use broader tolerances, risking nuisance trips or — more dangerously — failure to protect the compressor under true fault conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Refrigerant circuit access may be required depending on switch location. Tools needed: manifold gauge set, screwdrivers, adjustable wrench, multimeter. Always recover refrigerant per EPA Section 608 before opening refrigerant lines. Verify the switch has tripped vs. failed using a multimeter before replacement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. In-stock units 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 PA13NR04200GAHAA\u003c\/strong\u003e 4-ton single-stage R-410A split-system heat pump. Select HK02ZA395 for the high-side pressure switch or HK02ZB028 for the low-side pressure switch. Confirm your faulty switch's part number from the unit's wiring diagram or data label before ordering. Not sure which switch you need? Our HVAC parts specialists can help verify the correct part before you buy — contact us before placing your order.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62909096821107,"sku":"PAYNE-PA13NR04200GAHAA-PRESSURE_SWITCH-HK02ZA395","price":43.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909096853875,"sku":"PAYNE-PA13NR04200GAHAA-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_968565c8-38eb-4977-85f3-4114e8fb8f46.jpg?v=1780718555","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa13nr04200gahaa-pressure-switch-jria74","provider":"National HVAC Parts","version":"1.0","type":"link"}