{"product_id":"carrier-py1rpa120180abwb-pressure-switch-jrhhrg","title":"OEM Carrier Pressure Switch for PY1RPA120180ABWB — HK02ZB044","description":"\u003ch1\u003eOEM Carrier Pressure Switch HK02ZB044 for Model PY1RPA120180ABWB\u003c\/h1\u003e\u003cp\u003eThis is the OEM factory-replacement pressure switch (part number \u003cstrong\u003eHK02ZB044\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier PY1RPA120180ABWB\u003c\/strong\u003e packaged unit. The pressure switch is a safety device that monitors the negative pressure (inches of water column, W.C.) produced by the induced-draft blower. It must close — confirming adequate combustion airflow — before the control board will allow the ignition sequence to begin. When this switch fails, the furnace section will lock out before ignition, typically logging a pressure switch fault code on the control board.\u003c\/p\u003e\u003cp\u003eCommon symptoms of a failed pressure switch include: the inducer motor runs but the system never advances to ignition, a flashing fault code indicating \"pressure switch stuck open,\" or intermittent no-heat calls that clear on a manual reset. Always verify the inducer motor, condensate drain, and pressure switch hose for blockages before condemning this switch — a good switch on a clogged system will still trip.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e OEM-matched W.C. (water column) setpoint | Single-port or dual-port configuration per factory design | 1\/4\" hose barb inlet | SPST normally open contacts | Factory-calibrated trip point\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 unit. Aftermarket substitutes frequently carry wider tolerance ratings, which can allow the furnace to operate outside safe combustion parameters — a potentially dangerous compromise on any gas-fired appliance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Shut off gas and power before servicing. Tools needed: 1\/4\" nut driver, flat-blade screwdriver, digital manometer (recommended for verification). Disconnect the hose and two wire leads, swap the switch, and confirm the hose is free of moisture or blockage before restoring power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Ships same business day when ordered before 3 PM local time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered for the \u003cstrong\u003eCarrier PY1RPA120180ABWB\u003c\/strong\u003e packaged gas\/electric unit. Always cross-reference part number \u003cstrong\u003eHK02ZB044\u003c\/strong\u003e against your unit's data plate and wiring diagram before ordering. Our HVAC parts specialists are available to confirm fitment — order with confidence and get back up and running fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640598450547,"sku":"CARRIE-PY1RPA120180ABWB-PRESSURE_SWITCH-HK02ZB044","price":47.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640598483315,"sku":"CARRIE-PY1RPA120180ABWB-PRESSURE_SWITCH-HK02ZB044-GEN","price":41.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-HK02ZB044_2a486c18-d8e7-4755-af48-430e500ef029.jpg?v=1775038115","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py1rpa120180abwb-pressure-switch-jrhhrg","provider":"National HVAC Parts","version":"1.0","type":"link"}