{"product_id":"payne-pa10ja048000aaaa-pressure-switch-jria74","title":"OEM Payne Pressure Switch High \u0026 Low for PA10JA048000AAAA","description":"\u003ch1\u003eOEM Payne High \u0026amp; Low Pressure Switch for Model PA10JA048000AAAA\u003c\/h1\u003e\u003cp\u003eThese OEM pressure switches are the factory-specified replacements for the \u003cstrong\u003ePayne PA10JA048000AAAA\u003c\/strong\u003e packaged air conditioning and heating unit. The pressure switch proves that the inducer motor has established adequate draft before allowing the ignition sequence to proceed. When either the high-pressure switch (\u003cstrong\u003eHK02ZA395\u003c\/strong\u003e) or low-pressure switch (\u003cstrong\u003eHK02ZB028\u003c\/strong\u003e) fails, the control board cannot confirm safe venting conditions and will lock out the system — typically resulting in a no-heat fault with the inducer running but no spark or gas flow.\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 | Rated water column (W.C.) pressure matched to factory spec | Normally-open diaphragm-style switch | 24V control circuit compatible\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM Payne pressure switches are calibrated to the exact W.C. rating required by the PA10JA048000AAAA. Aftermarket switches frequently ship with incorrect trip points, causing nuisance lockouts or — worse — allowing operation under unsafe draft conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Requires disconnecting 24V signal wires and rubber vacuum hose from the inducer port. Tools needed: flathead screwdriver, needle-nose pliers, multimeter (to confirm open\/closed state), and a manometer if verifying W.C. rating. Always confirm inducer hose is free of condensate blockage before replacing the switch.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the \u003cstrong\u003ePayne PA10JA048000AAAA\u003c\/strong\u003e 4-ton packaged unit. Verify which switch — high (HK02ZA395) or low (HK02ZB028) — has failed using a multimeter before ordering. Both switches are available individually. If you are unsure which part you need, our HVAC parts specialists will verify fitment before your order ships.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62909226746227,"sku":"PAYNE-PA10JA048000AAAA-PRESSURE_SWITCH-HK02ZA395","price":43.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909226778995,"sku":"PAYNE-PA10JA048000AAAA-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_b30ee564-fd3a-4032-ad08-cc446b6efe20.jpg?v=1780718409","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa10ja048000aaaa-pressure-switch-jria74","provider":"National HVAC Parts","version":"1.0","type":"link"}