{"product_id":"payne-pa13nr03600gajaa-pressure-switch-jrhhwm","title":"OEM Payne Low Pressure Switch HK02ZB028 for PA13NR03600GAJAA","description":"\u003ch1\u003eOEM Payne Low Pressure Switch HK02ZB028 for Model PA13NR03600GAJAA\u003c\/h1\u003e\u003cp\u003eThis OEM low pressure switch (part number \u003cstrong\u003eHK02ZB028\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003ePayne PA13NR03600GAJAA\u003c\/strong\u003e split-system air conditioner. The pressure switch is a critical safety device that monitors the suction-side refrigerant pressure to confirm the inducer motor is operating correctly before allowing the ignition sequence to proceed. When this switch fails or sticks, the system will lock out before ignition — leaving you with no heating or cooling and often triggering a fault code on the control board.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Low pressure switch | OEM part number HK02ZB028 | Factory-calibrated W.C. (water column) rating | Direct drop-in replacement with correct hose port and terminal configuration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine OEM pressure switch manufactured to exact factory tolerances. Generic aftermarket switches frequently carry imprecise trip points, which can cause nuisance lockouts or — worse — allow unsafe operation outside design parameters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Disconnect power before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, and a digital multimeter to verify switch continuity. Take a photo of hose routing and wiring before disconnecting. Swap the vacuum hose and two-wire harness connector, then restore power to test.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects in materials and workmanship. Orders placed before cutoff ship same business day from our stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the Payne \u003cstrong\u003ePA13NR03600GAJAA\u003c\/strong\u003e split-system unit. Always cross-reference the OEM part number HK02ZB028 printed on your existing switch before ordering to confirm an exact match. If you have any questions about fitment, our HVAC parts specialists are available to verify compatibility before you purchase — so you get the right part the first time.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62909101539699,"sku":"PAYNE-PA13NR03600GAJAA-PRESSURE_SWITCH-HK02ZB028","price":43.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909101572467,"sku":"PAYNE-PA13NR03600GAJAA-PRESSURE_SWITCH-HK02ZB028-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-HK02ZB028_88ccecc9-1d1f-4549-bf47-acb08427735f.jpg?v=1780718388","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa13nr03600gajaa-pressure-switch-jrhhwm","provider":"National HVAC Parts","version":"1.0","type":"link"}