{"product_id":"payne-pa10pa04800gahaa-pressure-switch-jrhhwm","title":"OEM Payne Low Pressure Switch HK02ZB028 for PA10PA04800GAHAA","description":"\u003ch1\u003eOEM Payne Low Pressure Switch HK02ZB028 for Model PA10PA04800GAHAA\u003c\/h1\u003e\u003cp\u003eThis OEM low pressure switch (part number \u003cstrong\u003eHK02ZB028\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003ePayne PA10PA04800GAHAA\u003c\/strong\u003e packaged unit. The pressure switch is a safety device that monitors the negative pressure (inches water column) created by the inducer motor to confirm proper venting before allowing the ignition sequence to proceed. When this switch fails — or when it reads a fault in the venting circuit — the control board will lock out the furnace prior to ignition, resulting in a no-heat call. Common symptoms include a flashing fault code indicating a pressure switch error, the inducer running continuously with no ignition, or the system failing to progress past the inducer pre-purge stage.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Low pressure switch | OEM part number HK02ZB028 | Factory-calibrated W.C. (inches water column) rating | Spade terminal connections | Direct drop-in replacement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM switch is calibrated to the exact W.C. rating required by the \u003cstrong\u003ePA10PA04800GAHAA\u003c\/strong\u003e heat exchanger and inducer assembly. Aftermarket substitutes with mismatched trip points can cause nuisance lockouts or — more dangerously — allow operation under unsafe venting conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Disconnect power before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, and a manometer if verifying switch trip point. Photograph all tubing and wiring connections before removal. Inspect rubber hose and port for cracks or blockages before condemning the switch.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In stock and ships 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\u003ePA10PA04800GAHAA\u003c\/strong\u003e packaged unit. Always verify the OEM part number on your existing switch label before ordering to confirm the correct W.C. rating for your application. Our fitment team is available to verify compatibility before you purchase — same-day shipping available on all in-stock orders.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62909213704563,"sku":"PAYNE-PA10PA04800GAHAA-PRESSURE_SWITCH-HK02ZB028","price":43.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909213737331,"sku":"PAYNE-PA10PA04800GAHAA-PRESSURE_SWITCH-HK02ZB028-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-HK02ZB028_d7ef0c51-2a48-4938-b24c-202022fbdb58.jpg?v=1780718382","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa10pa04800gahaa-pressure-switch-jrhhwm","provider":"National HVAC Parts","version":"1.0","type":"link"}