{"product_id":"payne-pa1rea048000abwb-pressure-switch-jri7yl","title":"OEM Payne Pressure Switch HK02ZA442 \/ HK02ZB044 — PA1REA048000ABWB","description":"\u003ch1\u003eOEM Payne Pressure Switch HK02ZA442 \/ HK02ZB044 for Model PA1REA048000ABWB\u003c\/h1\u003e\u003cp\u003eThis OEM pressure switch is the factory-specified replacement for the \u003cstrong\u003ePayne PA1REA048000ABWB\u003c\/strong\u003e gas furnace. The pressure switch monitors negative pressure created by the inducer draft motor to confirm safe venting conditions before allowing the ignition sequence to proceed. When the switch fails or the diaphragm weakens, the control board never receives the \"prove\" signal — resulting in a no-heat lockout, often with a fault code indicating a stuck-open or stuck-closed pressure switch. This listing covers both OEM part numbers \u003cstrong\u003eHK02ZA442\u003c\/strong\u003e (High Pressure Switch) and \u003cstrong\u003eHK02ZB044\u003c\/strong\u003e (Pressure Switch) as applicable to this model; verify your existing part number on the switch body or wiring diagram before ordering.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Factory-matched W.C. (water column) trip point | Single-port diaphragm design | 24V control circuit compatible | Direct OEM replacement — no modifications required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM pressure switches are calibrated to exact W.C. specifications for this furnace. Generic substitutes often carry wide tolerance ranges that can cause nuisance trips, failed ignition sequences, or — more critically — unsafe venting conditions if the switch proves too easily.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Power down and disconnect the furnace before servicing. Tools needed: 1\/4\" nut driver, needle-nose pliers, and a manometer (recommended to verify inducer pressure post-install). Photograph all hose and wiring connections before removal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Payne \u003cstrong\u003ePA1REA048000ABWB\u003c\/strong\u003e gas furnace. Cross-reference your existing part number — HK02ZA442 or HK02ZB044 — against the switch body label or your unit's wiring diagram to confirm the correct switch for your application. If you're unsure, our fitment team is available to verify before you order. In stock and ready to ship today.\u003c\/p\u003e","brand":"Payne","offers":[{"title":"OEM","offer_id":62908961816947,"sku":"PAYNE-PA1REA048000ABWB-PRESSURE_SWITCH-HK02ZA442","price":43.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62908961849715,"sku":"PAYNE-PA1REA048000ABWB-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_3b750849-0d2b-42b8-91d3-9509e8a99a19.jpg?v=1780718571","url":"https:\/\/nationalhvacparts.com\/products\/payne-pa1rea048000abwb-pressure-switch-jri7yl","provider":"National HVAC Parts","version":"1.0","type":"link"}