{"product_id":"carrier-py3gnaa48115na-pressure-switch-h43sg3","title":"OEM Carrier Pressure Switch 0.18\" W.C. for PY3GNAA48115NA","description":"\u003ch1\u003eOEM Carrier Furnace Draft Pressure Switch 0.18\" W.C. for Model PY3GNAA48115NA\u003c\/h1\u003e\u003cp\u003eThis is the OEM factory-specified draft inducer pressure switch for the \u003cstrong\u003eCarrier PY3GNAA48115NA\u003c\/strong\u003e packaged gas unit. The pressure switch monitors negative pressure created by the inducer blower to confirm safe venting conditions before allowing ignition to proceed. When this switch fails or sticks open, the furnace will lock out during the inducer proving stage — typically before any spark or ignition attempt — leaving you with no heat. A failed pressure switch is one of the most common causes of furnace \"lockout\" fault codes.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 0.18\" W.C. (water column) set point | Normally open | Single-port draft proving switch | Honeywell-manufactured (IS20224-5236 \/ 1938D2\/B) | OEM part HK06WC061, superseded by \u003cstrong\u003eHK06MB061\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM switch is calibrated to the exact 0.18\" W.C. factory set point. Generic switches often carry wider tolerances, risking nuisance lockouts or — more dangerously — allowing ignition under unsafe venting conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Disconnect power and gas before servicing. Tools needed: flathead screwdriver, needle-nose pliers, multimeter (for continuity verification). Label or photograph tubing connections before removal. Replace inducer hose if cracked or brittle while you have access.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty \u0026amp; Shipping:\u003c\/strong\u003e Backed by a 1-year OEM parts 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 for the Carrier \u003cstrong\u003ePY3GNAA48115NA\u003c\/strong\u003e packaged gas\/electric unit. Also fits select Bryant and Payne models sharing the same inducer assembly. Always verify the 0.18\" W.C. rating on your existing switch or unit data plate before ordering. Our HVAC parts specialists are available to confirm fitment — contact us before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640446636403,"sku":"CARRIE-PY3GNAA48115NA-PRESSURE_SWITCH-HK06WC061","price":52.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640446669171,"sku":"CARRIE-PY3GNAA48115NA-PRESSURE_SWITCH-HK06WC061-GEN","price":46.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-HK06WC061_39a6b798-2031-465b-a9e0-79474aa5dc4d.jpg?v=1775036552","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3gnaa48115na-pressure-switch-h43sg3","provider":"National HVAC Parts","version":"1.0","type":"link"}