{"product_id":"payne-pa10ja04200gacaa-pressure-switch-jria74","title":"OEM Payne Pressure Switch HK02ZA395 \/ HK02ZB028 — PA10JA04200GACAA","description":"\u003ch1\u003eOEM Payne High \u0026amp; Low Pressure Switch for Model PA10JA04200GACAA\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 factory-specified for the \u003cstrong\u003ePayne PA10JA04200GACAA\u003c\/strong\u003e packaged unit. The pressure switch monitors the inducer motor's draft by sensing the negative water column (W.C.) pressure it generates. When the switch fails — or the inducer is unable to generate adequate draft — the control board receives no confirmation signal and locks out the ignition sequence entirely, resulting in a no-heat condition. Common symptoms include the inducer running continuously with no subsequent ignition attempt, or a fault code indicating a pressure switch stuck open or closed.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e OEM part numbers HK02ZA395 (High Pressure Switch) and HK02ZB028 (Low Pressure Switch) | Factory-calibrated W.C. setpoints | Spade terminal connections | Direct drop-in replacement — no modification required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM pressure switches are precision-calibrated to the exact W.C. rating required by the Payne PA10JA04200GACAA. Generic substitutes frequently carry loose tolerances, causing nuisance lockouts or — worse — failing to detect true draft loss, creating a safety hazard.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the disconnect before beginning. Tools needed: flat-head and Phillips screwdrivers, needle-nose pliers, and a manometer (recommended to verify draft pressure post-install). Photograph all hose and wire routing before disconnecting the old switch.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In-stock units ship same business day from our warehouse when ordered before 3 PM local time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the Payne \u003cstrong\u003ePA10JA04200GACAA\u003c\/strong\u003e packaged unit. Verify your existing part numbers against HK02ZA395 and HK02ZB028 on your unit's wiring diagram or data plate before ordering. Not sure which switch you need? Our HVAC parts specialists can confirm fitment — contact us before you order and we'll make sure you get the right part the first time.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62909239525747,"sku":"PAYNE-PA10JA04200GACAA-PRESSURE_SWITCH-HK02ZA395","price":43.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909239558515,"sku":"PAYNE-PA10JA04200GACAA-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_6fb16f3f-8524-4be1-836c-6a22df769a44.jpg?v=1780718531","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa10ja04200gacaa-pressure-switch-jria74","provider":"National HVAC Parts","version":"1.0","type":"link"}