{"product_id":"payne-pa13pr03600gadaa-pressure-switch-jria74","title":"OEM Payne Pressure Switch HK02ZA395 \/ HK02ZB028 — PA13PR03600GADAA","description":"\u003ch1\u003eOEM Payne High \u0026amp; Low Pressure Switch for Model PA13PR03600GADAA\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 for the Payne \u003cstrong\u003ePA13PR03600GADAA\u003c\/strong\u003e packaged air conditioning and heating unit. The pressure switch monitors the inducer blower to confirm adequate airflow and draft before allowing the ignition sequence to proceed. When either switch fails — or the contacts stick open due to age, debris, or moisture — the control board cannot verify safe combustion conditions and will lock out the system entirely, leaving you with no heat and often a diagnostic fault code indicating a pressure switch error.\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-calibrated W.C. (water column) rating | Single-port hose barb | 24V control circuit compatible\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e These factory OEM switches are calibrated to the exact water-column trip point specified for the PA13PR03600GADAA. Generic pressure switches frequently carry wider tolerance ranges, risking nuisance lockouts or — more dangerously — failure to trip under true fault conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Power down and lock out the unit before starting. Tools needed: flathead screwdriver, 1\/4\" nut driver, needle-nose pliers, and a manometer to verify trip point after installation. Carefully transfer the rubber hose from the old switch to the new one and confirm secure seating to prevent false trips.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Orders placed before cutoff ship the same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the Payne \u003cstrong\u003ePA13PR03600GADAA\u003c\/strong\u003e packaged unit. Always cross-reference the part number on your existing switch and confirm hose port count before ordering. Our fitment team is available to verify compatibility before you purchase — same-day shipping ensures you're back up and running fast.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62909072408947,"sku":"PAYNE-PA13PR03600GADAA-PRESSURE_SWITCH-HK02ZA395","price":43.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909072441715,"sku":"PAYNE-PA13PR03600GADAA-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_f7c25f7d-4d87-4beb-bab9-ceff3b603495.jpg?v=1780718561","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa13pr03600gadaa-pressure-switch-jria74","provider":"National HVAC Parts","version":"1.0","type":"link"}