OEM Carrier Single Run Capacitor 4 MFD 370V for Model PY3PPA048115AA

This is the factory OEM single run capacitor for Carrier model PY3PPA048115AA packaged HVAC equipment, sold under OEM part numbers P291-0403 (4 MFD 370V) and P291-1503 (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.

• Specs (P291-0403): 4 MFD (microfarad) | 370 VAC | Oval case | Single run | Factory-matched tolerance — also cross-references GE/Genteq C304L, 27L571, 97F5704, HC90AA004, HC91CA004, HC90AB004
• OEM vs Generic: 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.
• Install Difficulty: 2/5 — 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.
• Warranty: 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our warehouse.

Compatibility: Designed as the factory-specified replacement for Carrier PY3PPA048115AA 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 — in stock and ships today.