{"product_id":"carrier-py1pna018040acba-pressure-switch-jrhhvr","title":"OEM Carrier Pressure Switch 22#CLS 7#OPN 50\" Leads — PY1PNA018040ACBA","description":"\u003ch1\u003eOEM Carrier Pressure Switch HK02ZB038 for Model PY1PNA018040ACBA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement pressure switch for the \u003cstrong\u003eCarrier PY1PNA018040ACBA\u003c\/strong\u003e furnace, sold under Carrier part number \u003cstrong\u003eHK02ZB038\u003c\/strong\u003e. The pressure switch is a safety device that proves the induced draft blower is operating correctly before allowing the ignition sequence to begin. It monitors negative pressure inside the flue system via a rubber hose connected to the inducer housing. When the switch fails — or when the hose cracks, clogs, or collapses — the furnace will lock out before ignition, often displaying a fault code and leaving you with no heat.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Close pressure: 22\" W.C. | Open pressure: 7\" W.C. | Lead length: 50\" | Single-port, normally open configuration | Factory-calibrated setpoints\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM switch with precision-calibrated W.C. setpoints. Aftermarket switches frequently drift ±15% from rated pressure, causing nuisance lockouts or, worse, failing to prove a true inducer fault — a potential safety hazard.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Turn off power and gas before beginning. Tools needed: flathead screwdriver, needle-nose pliers, and a multimeter for continuity verification. Inspect and replace the rubber pressure hose if cracked or kinked during the same service call.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against manufacturing defects. Ships same business day from our warehouse stock.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered as a direct OEM drop-in for the \u003cstrong\u003eCarrier PY1PNA018040ACBA\u003c\/strong\u003e furnace. Always verify the W.C. rating and lead length printed on your original switch before ordering. Our fitment team is available to confirm compatibility — reach out before you order and we'll make sure you get the right part, guaranteed. \u003cstrong\u003eOrder now and ship today.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641008738675,"sku":"CARRIE-PY1PNA018040ACBA-PRESSURE_SWITCH-HK02ZB038","price":57.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641008771443,"sku":"CARRIE-PY1PNA018040ACBA-PRESSURE_SWITCH-HK02ZB038-GEN","price":50.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-pressure-switch-HK02ZB038_ab34d721-38b8-46c7-90cc-ca64a97b5ccb.jpg?v=1775037002","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py1pna018040acba-pressure-switch-jrhhvr","provider":"National HVAC Parts","version":"1.0","type":"link"}