{"product_id":"payne-pa10ja030000acaa-pressure-switch-jria74","title":"OEM Payne Pressure Switch Set for PA10JA030000ACAA — HK02ZA395 \u0026 HK02Z","description":"\u003ch1\u003eOEM Payne High \u0026amp; Low Pressure Switch Set for Model PA10JA030000ACAA\u003c\/h1\u003e\u003cp\u003eThis OEM-matched pressure switch set includes both the \u003cstrong\u003ehigh pressure switch (HK02ZA395)\u003c\/strong\u003e and \u003cstrong\u003elow pressure switch (HK02ZB028)\u003c\/strong\u003e for the \u003cstrong\u003ePayne PA10JA030000ACAA\u003c\/strong\u003e packaged air conditioning unit. Pressure switches prove that the inducer motor is generating adequate airflow before allowing the control board to proceed with the ignition sequence. When either switch fails — or a flue obstruction holds them open — the system will lock out before ignition, leaving you with a no-heat or no-cool condition and a flashing diagnostic code on the control board.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e High pressure switch OEM part \u003cstrong\u003eHK02ZA395\u003c\/strong\u003e | Low pressure switch OEM part \u003cstrong\u003eHK02ZB028\u003c\/strong\u003e | Rated for the factory-specified water column (W.C.) pressure differential | SPST normally-open configuration | 1\/4\" Hose port fitting\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM pressure switches are calibrated to the exact W.C. trip point required by your Payne unit. Aftermarket switches can drift off the rated set point, causing nuisance lockouts or, worse, allowing unsafe venting conditions to go undetected.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Tools needed: 1\/4\" and 5\/16\" nut drivers, needle-nose pliers, multimeter set to continuity, and replacement hose tubing if existing tubing is cracked or kinked. Always shut off power at the disconnect and check the inducer hose for blockages before condemning either switch — a clogged hose is the most common root cause of pressure switch failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty on both switches. In-stock and ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e This listing covers the matched high and low pressure switch pair for the \u003cstrong\u003ePayne PA10JA030000ACAA\u003c\/strong\u003e packaged unit. Verify both OEM part numbers — \u003cstrong\u003eHK02ZA395\u003c\/strong\u003e (high) and \u003cstrong\u003eHK02ZB028\u003c\/strong\u003e (low) — against your unit's wiring diagram or data plate before ordering. Not sure which switch you need? Our HVAC parts specialists can confirm fitment before you buy. Order now and receive same-day shipping on all in-stock items.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62909245456755,"sku":"PAYNE-PA10JA030000ACAA-PRESSURE_SWITCH-HK02ZA395","price":43.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909245489523,"sku":"PAYNE-PA10JA030000ACAA-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_0e70853d-791e-42e3-a111-d35ce47ae3ff.jpg?v=1780718635","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa10ja030000acaa-pressure-switch-jria74","provider":"National HVAC Parts","version":"1.0","type":"link"}