{"product_id":"payne-pa13nr03600gacaa-pressure-switch-jria74","title":"OEM Payne Pressure Switch HK02ZA395 \/ HK02ZB028 — PA13NR03600GACAA","description":"\u003ch1\u003eOEM Payne High \u0026amp; Low Pressure Switch for Model PA13NR03600GACAA\u003c\/h1\u003e\u003cp\u003eThis OEM pressure switch kit covers both the \u003cstrong\u003ehigh pressure switch (HK02ZA395)\u003c\/strong\u003e and \u003cstrong\u003elow pressure switch (HK02ZB028)\u003c\/strong\u003e for the \u003cstrong\u003ePayne PA13NR03600GACAA\u003c\/strong\u003e split-system air conditioner. The pressure switch is a refrigerant-side safety device that monitors system pressures and signals the control board to shut down the compressor if pressures rise too high or drop too low. When either switch fails, you'll typically see the compressor short-cycling, a system that refuses to start, or fault codes indicating a pressure trip condition on your thermostat or control board display.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e High Pressure Switch — HK02ZA395 | Low Pressure Switch — HK02ZB028 | 24V control circuit compatible | Factory-calibrated cut-out and cut-in set points matched to R-410A refrigerant operating range\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM pressure switches are factory-calibrated to exact cut-out pressures for the PA13NR03600GACAA refrigerant circuit. Aftermarket substitutes frequently carry wider pressure tolerances, risking nuisance trips or, worse, allowing the compressor to run outside safe operating limits — shortening its service life significantly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Refrigerant pressure switch replacement requires recovering system pressure before disconnecting any refrigerant-side fittings. Tools needed: manifold gauge set, adjustable wrench, multimeter, and HVAC service valve keys. EPA Section 608 certification required for refrigerant handling. Control-circuit wiring swap is straightforward once refrigerant work is complete — photograph all wiring before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty on both HK02ZA395 and HK02ZB028. Orders placed before 3 PM EST ship same business day from our climate-controlled parts warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the \u003cstrong\u003ePayne PA13NR03600GACAA\u003c\/strong\u003e 3-ton R-410A split-system condenser. Always cross-reference your unit's data plate and existing switch markings against part numbers HK02ZA395 (high) and HK02ZB028 (low) before ordering. Not sure which switch you need? Our HVAC parts specialists can verify fitment — contact us before you buy. \u003cstrong\u003eIn stock and ready to ship today.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62909111107955,"sku":"PAYNE-PA13NR03600GACAA-PRESSURE_SWITCH-HK02ZA395","price":43.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909111140723,"sku":"PAYNE-PA13NR03600GACAA-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_8897e5c6-767d-423e-8ee1-7a2a14255751.jpg?v=1780718551","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa13nr03600gacaa-pressure-switch-jria74","provider":"National HVAC Parts","version":"1.0","type":"link"}