{"product_id":"payne-pa1rpa036000abwa-pressure-switch-jri7yl","title":"OEM Payne Pressure Switch for PA1RPA036000ABWA — HK02ZA442","description":"\u003ch1\u003eOEM Payne Pressure Switch for Model PA1RPA036000ABWA — HK02ZA442 \/ HK02ZB044\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM pressure switch designed specifically for the \u003cstrong\u003ePayne PA1RPA036000ABWA\u003c\/strong\u003e packaged air conditioning and heating system. The pressure switch monitors inducer motor operation by detecting negative air pressure through the flue or drain port. When the inducer creates the correct draft, the switch closes and signals the control board to advance to the ignition sequence. A failed pressure switch causes a hard lockout before ignition — the furnace or heating section will attempt to start, fail to prove draft, and shut down without producing heat.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Replaces OEM part numbers \u003cstrong\u003eHK02ZA442\u003c\/strong\u003e (High Pressure Switch) and \u003cstrong\u003eHK02ZB044\u003c\/strong\u003e (Pressure Switch) | Water column (W.C.) rating factory-matched to Payne PA1RPA036000ABWA specifications | Single-port design | 24V control circuit compatible\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM pressure switches are calibrated to exact W.C. trip points for your specific unit. Aftermarket switches with loose tolerances can cause nuisance lockouts or, worse, fail to detect a true draft failure — a safety risk with gas-fired systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Requires access to the inducer compartment. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, digital manometer (recommended to verify W.C. reading after install). Always disconnect power before servicing. Check drain tubing for blockages 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 Engineered for the \u003cstrong\u003ePayne PA1RPA036000ABWA\u003c\/strong\u003e 3-ton packaged unit. Cross-references OEM part numbers HK02ZA442 and HK02ZB044. Verify your existing switch's W.C. rating and port configuration against your unit's data plate before ordering. Our fitment team is available to confirm compatibility prior to purchase — same-day shipping available on all in-stock OEM parts.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62908945629555,"sku":"PAYNE-PA1RPA036000ABWA-PRESSURE_SWITCH-HK02ZA442","price":43.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62908945662323,"sku":"PAYNE-PA1RPA036000ABWA-PRESSURE_SWITCH-HK02ZA442-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-HK02ZA442_1b1b11ec-e4d8-41da-94e5-3523d4a8c61b.jpg?v=1780718393","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa1rpa036000abwa-pressure-switch-jri7yl","provider":"National HVAC Parts","version":"1.0","type":"link"}