{"product_id":"payne-pa10pa03600gabaa-pressure-switch-jria74","title":"OEM Payne Pressure Switch HK02ZA395 \/ HK02ZB028 — PA10PA03600GABAA","description":"\u003ch1\u003eOEM Payne High \u0026amp; Low Pressure Switch for Model PA10PA03600GABAA\u003c\/h1\u003e\u003cp\u003eThis OEM pressure switch kit — covering both the \u003cstrong\u003ehigh pressure switch (HK02ZA395)\u003c\/strong\u003e and \u003cstrong\u003elow pressure switch (HK02ZB028)\u003c\/strong\u003e — is the factory-specified replacement for the \u003cstrong\u003ePayne PA10PA03600GABAA\u003c\/strong\u003e packaged air conditioning and heating unit. The pressure switch monitors the inducer motor's draft pressure via a rubber hose connected to the inducer housing. When the inducer proves adequate airflow, the switch closes and signals the control board to advance through the ignition sequence. A failed pressure switch interrupts this proof circuit, leaving the system in a pre-ignition lockout — the inducer runs, but the burners never light.\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 | 24V control circuit compatible | Spade terminal connectors | OEM hose barb fitting dimensions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM pressure switches are factory-calibrated to the exact W.C. rating required by the PA10PA03600GABAA's inducer assembly. Generic replacements frequently carry wider pressure tolerances, risking nuisance lockouts in cold weather or, worse, failing to detect a true blocked flue condition — a potential safety hazard.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Disconnect power before servicing. Tools needed: 1\/4\" nut driver, flathead screwdriver, multimeter (continuity test), and a manometer if verifying W.C. rating. Inspect the rubber pressure hose for cracks or blockages before replacing the switch — a clogged hose is the most common misdiagnosis. Photograph all hose and wire connections before disassembly.\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 cutoff ship same business day from our HVAC-dedicated warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the \u003cstrong\u003ePayne PA10PA03600GABAA\u003c\/strong\u003e packaged unit. Always cross-reference the OEM part number on your existing switch's label — HK02ZA395 (high) or HK02ZB028 (low) — before ordering. Not sure which switch failed? Our parts team can help verify fitment and diagnose which switch to replace. Order now and get your system back online fast — \u003cstrong\u003ein stock and ships today.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62909217341811,"sku":"PAYNE-PA10PA03600GABAA-PRESSURE_SWITCH-HK02ZA395","price":43.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909217374579,"sku":"PAYNE-PA10PA03600GABAA-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_ef8d4d19-8f56-4511-a30d-47a6496e33a0.jpg?v=1780718534","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa10pa03600gabaa-pressure-switch-jria74","provider":"National HVAC Parts","version":"1.0","type":"link"}