{"product_id":"payne-pa13nr018000aeaa-pressure-switch-jria74","title":"OEM Payne Pressure Switch Kit for PA13NR018000AEAA — HK02ZA395 \/ HK02Z","description":"\u003ch1\u003eOEM Payne High \u0026amp; Low Pressure Switch Kit for Model PA13NR018000AEAA\u003c\/h1\u003e\u003cp\u003eThis OEM pressure switch kit includes both the \u003cstrong\u003ehigh pressure switch (HK02ZA395)\u003c\/strong\u003e and \u003cstrong\u003elow pressure switch (HK02ZB028)\u003c\/strong\u003e factory-specified for the \u003cstrong\u003ePayne PA13NR018000AEAA\u003c\/strong\u003e split-system heat pump. Pressure switches are safety devices that monitor refrigerant-side pressures and send a signal to the control board confirming safe operating conditions. When either switch fails — or refrigerant pressure falls outside the designed range — the system will lock out before completing a heating or cooling cycle, often displaying a fault code or simply refusing to start. Common symptoms include the unit attempting to start and immediately shutting down, or an error code indicating high- or low-pressure fault.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Includes HK02ZA395 High Pressure Switch and HK02ZB028 Low Pressure Switch | Factory-calibrated setpoints | SPST normally open\/normally closed configurations per OEM design | Direct plug-in harness connectors for OEM fit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM pressure switches are calibrated to exact factory cutout and reset pressures for the PA13NR018000AEAA refrigerant circuit. Aftermarket switches often carry wider pressure tolerances, which can allow unsafe operating conditions to go undetected or cause nuisance trips that shorten compressor life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Refrigerant system work should only be performed by an EPA 608-certified technician. Tools needed: manifold gauge set, flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Always verify system pressures are within spec before condemning a switch — a failed switch may indicate an underlying refrigerant charge issue.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty on both switches. Orders ship same business day from our stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e This kit is factory-matched to the \u003cstrong\u003ePayne PA13NR018000AEAA\u003c\/strong\u003e 1.5-ton split-system heat pump. Always cross-reference OEM part numbers HK02ZA395 and HK02ZB028 against your unit's data plate and wiring diagram before installation. Our fitment team is available to confirm compatibility before you order — same-day shipping available on all in-stock OEM Payne parts.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62909143679347,"sku":"PAYNE-PA13NR018000AEAA-PRESSURE_SWITCH-HK02ZA395","price":43.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909143712115,"sku":"PAYNE-PA13NR018000AEAA-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_1502bc24-97dc-4196-b1c6-b4a4f3384111.jpg?v=1780718618","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa13nr018000aeaa-pressure-switch-jria74","provider":"National HVAC Parts","version":"1.0","type":"link"}