{"product_id":"payne-pa10ja02400gacaa-pressure-switch-jria74","title":"OEM Payne Pressure Switch HK02ZA395 \/ HK02ZB028 — PA10JA02400GACAA","description":"\u003ch1\u003eOEM Payne High \u0026amp; Low Pressure Switch HK02ZA395 \/ HK02ZB028 for Model PA10JA02400GACAA\u003c\/h1\u003e\u003cp\u003eThese OEM pressure switches are the factory-specified replacements for the \u003cstrong\u003ePayne PA10JA02400GACAA\u003c\/strong\u003e packaged air conditioning unit. The high pressure switch (HK02ZA395) and low pressure switch (HK02ZB028) monitor refrigerant pressure on the high and low sides of the refrigerant circuit respectively. When either switch detects pressure outside the safe operating range, it signals the control board to shut down the compressor, protecting the system from damage. Common failure symptoms include the system locking out on a pressure fault, the compressor short-cycling, or the unit refusing to start despite the thermostat calling for cooling.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e High Pressure Switch — OEM Part HK02ZA395 | Low Pressure Switch — OEM Part HK02ZB028 | Factory-matched pressure setpoints for R-410A refrigerant systems | 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 are calibrated to exact factory trip and reset pressures. Aftermarket substitutes often carry wider pressure tolerances, risking nuisance lockouts or, worse, insufficient compressor protection that leads to costly failures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Refrigerant system work must be performed by an EPA 608-certified technician. Tools needed: manifold gauge set, multimeter, flathead and Phillips screwdrivers, needle-nose pliers. Always recover refrigerant before opening the system; photograph all wiring connections prior to removal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Orders placed by 3 PM local time 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 PA10JA02400GACAA\u003c\/strong\u003e packaged air conditioning unit. Verify OEM part numbers HK02ZA395 (high side) and HK02ZB028 (low side) against your unit's data plate and wiring diagram before ordering. Not sure which switch you need? Our HVAC parts specialists can confirm fitment before you buy — contact us today and get your system back online fast.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62909247717747,"sku":"PAYNE-PA10JA02400GACAA-PRESSURE_SWITCH-HK02ZA395","price":43.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909247750515,"sku":"PAYNE-PA10JA02400GACAA-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_c1d36659-9940-4057-848f-8393eab109b0.jpg?v=1780718527","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa10ja02400gacaa-pressure-switch-jria74","provider":"National HVAC Parts","version":"1.0","type":"link"}