{"product_id":"carrier-py3pna048090na-capacitor-42kxl1","title":"OEM Carrier Single Run Capacitor 4 MFD 370V for PY3PNA048090NA","description":"\u003ch1\u003eOEM Carrier Single Run Capacitor 4 MFD 370V for Model PY3PNA048090NA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM single run capacitor for the \u003cstrong\u003eCarrier PY3PNA048090NA\u003c\/strong\u003e packaged unit. The run capacitor stays in circuit continuously during motor operation, providing the phase-shifted current that keeps the fan motor running smoothly and efficiently. When this capacitor fails, you'll typically hear a persistent hum from the unit with no fan motor spin-up, or the system may short-cycle and shut down on thermal overload — both classic signs of capacitor failure that can cascade into costly motor or compressor damage if left unaddressed.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 4 MFD (microfarad) | 370 VAC rated | Oval case | Factory-matched ±5% tolerance | OEM part numbers: P291-0403 (primary) \/ P291-1503 (secondary single run)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM capacitor is manufactured to Carrier's exact electrical tolerances and has been tested to 60,000 service hours. Generic units often carry ±10% MFD variance, which accelerates motor winding stress and shortens service life — especially in a packaged rooftop or ground-mount unit exposed to ambient heat extremes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Always disconnect power at the disconnect box and wait 5 minutes before touching capacitor terminals. A failed capacitor may still hold a dangerous charge — discharge using an insulated resistor or discharge tool before removal. Tools needed: 1\/4\" nut driver, needle-nose pliers, multimeter with capacitance mode. Photograph all wiring before disconnecting. Swap one wire at a time to avoid miswiring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In-stock and ships same business day from our warehouse. Genuine Carrier \/ Totaline part with UL approval and RoHS compliance.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered as a direct OEM replacement for \u003cstrong\u003eCarrier PY3PNA048090NA\u003c\/strong\u003e packaged units. Verify the MFD rating and voltage on your unit's data plate before ordering — always match MFD exactly and use equal or higher voltage rating. Our fitment team is standing by to confirm compatibility before you order — contact us with your model and serial number.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640382116211,"sku":"CARRIE-PY3PNA048090NA-CAPACITOR-P291-0403","price":20.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640382148979,"sku":"CARRIE-PY3PNA048090NA-CAPACITOR-P291-0403-GEN","price":17.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-capacitor-P291-0403_5a26beac-f5b5-478b-9356-99efe2124fbb.jpg?v=1775039236","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3pna048090na-capacitor-42kxl1","provider":"National HVAC Parts","version":"1.0","type":"link"}