{"product_id":"payne-pa13nr01800gaeaa-pressure-switch-jria74","title":"OEM Payne High\/Low Pressure Switch HK02ZA395 — PA13NR01800GAEAA","description":"\u003ch1\u003eOEM Payne High \u0026amp; Low Pressure Switch HK02ZA395 \/ HK02ZB028 for Model PA13NR01800GAEAA\u003c\/h1\u003e\u003cp\u003eThis OEM pressure switch is the factory-specified replacement for the \u003cstrong\u003ePayne PA13NR01800GAEAA\u003c\/strong\u003e split-system heat pump. The high pressure switch (HK02ZA395) and low pressure switch (HK02ZB028) monitor refrigerant pressure levels in the system and signal the control board to shut down the unit if pressures fall outside safe operating limits. When either switch fails, you'll typically experience nuisance lockouts, a unit that trips immediately on startup, or a system that won't run heating or cooling cycles at all — even with no actual refrigerant issue present.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e OEM-matched pressure cutout ratings | High-side switch: HK02ZA395 | Low-side switch: HK02ZB028 | Factory-calibrated set points for R-410A refrigerant | Spade terminal connections for direct plug-in replacement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM pressure switches use factory-calibrated trip points specific to the PA13NR01800GAEAA refrigerant circuit. Generic alternatives often carry wider tolerances that can allow unsafe pressure conditions to go undetected, risking compressor damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Always recover refrigerant and depressurize the system before replacing pressure switches. Tools needed: refrigerant recovery equipment, manifold gauges, needle-nose pliers, flathead screwdriver, and a multimeter to verify switch continuity before and after installation. A licensed HVAC technician is strongly recommended.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Ships same business day from our stocked warehouse — no waiting on back-orders.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the \u003cstrong\u003ePayne PA13NR01800GAEAA\u003c\/strong\u003e 1.5-ton R-410A split-system heat pump. Verify your existing switch part numbers (HK02ZA395 for high side, HK02ZB028 for low side) against your unit's wiring diagram or data plate before ordering. If you are unsure which switch has failed, our technical team can help you identify the correct part before purchase. In stock and ready to ship today — don't let a failed pressure switch keep your system down.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62909141549427,"sku":"PAYNE-PA13NR01800GAEAA-PRESSURE_SWITCH-HK02ZA395","price":43.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909141582195,"sku":"PAYNE-PA13NR01800GAEAA-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_aac1ceaf-66f7-4487-9b65-73716c8695b4.jpg?v=1780718370","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa13nr01800gaeaa-pressure-switch-jria74","provider":"National HVAC Parts","version":"1.0","type":"link"}