{"product_id":"carrier-py3ppa048115aa-capacitor-42kxl1","title":"OEM Carrier Single Run Capacitor 4 MFD 370V for PY3PPA048115AA","description":"\u003ch1\u003eOEM Carrier Single Run Capacitor 4 MFD 370V for Model PY3PPA048115AA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM single run capacitor for \u003cstrong\u003eCarrier model PY3PPA048115AA\u003c\/strong\u003e packaged HVAC equipment, sold under OEM part numbers \u003cstrong\u003eP291-0403\u003c\/strong\u003e (4 MFD 370V) and \u003cstrong\u003eP291-1503\u003c\/strong\u003e (15 MFD 370V). A run capacitor stays in circuit continuously during compressor and fan motor operation, supplying the sustained phase-shifted current needed to keep motors running efficiently. When a run capacitor degrades or fails, you'll typically experience symptoms such as a humming unit that won't fully start, a condenser fan that spins slowly or not at all, or a system that short-cycles and trips on thermal overload shortly after startup.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs (P291-0403):\u003c\/strong\u003e 4 MFD (microfarad) | 370 VAC | Oval case | Single run | Factory-matched tolerance — also cross-references GE\/Genteq C304L, 27L571, 97F5704, HC90AA004, HC91CA004, HC90AB004\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e Genuine Carrier\/Totaline capacitors are subjected to 100% electrical testing and feature a UL-approved, patented pressure-sensitive interrupter for internal fault protection. Generic units often skip individual testing and use lower-grade dielectric film, increasing the risk of premature failure and motor damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Discharge the capacitor fully before handling any terminals (use an insulated resistor or discharge tool). Tools needed: 1\/4\" nut driver, needle-nose pliers, multimeter set to capacitance. Always photograph existing wiring before disconnecting. Verify MFD and voltage ratings on the unit's data plate before installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed as the factory-specified replacement for \u003cstrong\u003eCarrier PY3PPA048115AA\u003c\/strong\u003e packaged HVAC equipment. This listing covers OEM part numbers P291-0403 (4 MFD 370V) and P291-1503 (15 MFD 370V) — confirm your unit's data plate MFD rating before ordering to ensure correct fitment. Note: Carrier sources its capacitors from manufacturers such as Totaline\/Genteq; the label on the capacitor will reflect the component manufacturer's name. Questions about fitment? Our technical team verifies compatibility before you order — \u003cstrong\u003ein stock and ships today\u003c\/strong\u003e.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640352428403,"sku":"CARRIE-PY3PPA048115AA-CAPACITOR-P291-0403","price":21.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640352461171,"sku":"CARRIE-PY3PPA048115AA-CAPACITOR-P291-0403-GEN","price":18.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-capacitor-P291-0403_646b2924-5523-4443-9f29-ce1cfec2bfe5.jpg?v=1775039251","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3ppa048115aa-capacitor-42kxl1","provider":"National HVAC Parts","version":"1.0","type":"link"}