OEM Carrier Single Run Capacitor 4 MFD 370V for Model PY3PPA030040NA

This is the factory OEM single run capacitor specified for the Carrier PY3PPA030040NA packaged unit. The run capacitor stays energized throughout the entire operating cycle, storing and releasing the electrical charge that keeps the condenser fan motor or blower motor running efficiently. When this capacitor weakens or fails, you'll typically notice the fan struggling to start, a low humming with no motor movement, the system blowing warm air, or short-cycling due to thermal overload on a motor that can no longer run properly. Replacing it promptly prevents expensive downstream motor damage.

• Specs: 4 MFD (microfarad) | 370 VAC rated | Oval case form factor | ±5% factory tolerance | 50/60 Hz | OEM Part Numbers: P291-0403 / P291-1503
• OEM vs Generic: This OEM Carrier/Totaline-branded capacitor is subjected to 100% electrical testing at the factory and uses high-grade metallized polypropylene film for proven reliability. Generic capacitors frequently run at ±10% MFD tolerance, which accelerates motor winding wear and shortens equipment life.
• Install difficulty: 2/5 — Always shut off power at the disconnect and allow several minutes for the capacitor to self-discharge before handling. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify discharge and confirm capacitance). Photograph all terminal wiring before disconnecting. Terminals are clearly labeled for straightforward reinstallation.
• Warranty: 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed as the direct OEM replacement for Carrier model PY3PPA030040NA packaged units. Cross-references: replaces OEM part numbers P291-0403 and P291-1503, as well as legacy GE/Genteq C304L, 27L571, and 97F5704. Always verify the MFD rating and voltage on your unit's data plate before ordering. Our team is available to confirm fitment — just reach out before you buy.