OEM Carrier Dual Run Capacitor 40+5 MFD 440V for Model PY1PJB048130NBAA

This is the factory-specified OEM dual run capacitor for the Carrier PY1PJB048130NBAA packaged unit. The dual run capacitor stores and delivers the electrical charge needed to start and sustain both the compressor and condenser fan motor simultaneously. When it degrades or fails, you'll notice symptoms such as a loud hum with no motor movement, the system blowing warm air, short-cycling within minutes of startup, or a complete no-start condition. Replacing it with the correct OEM part restores factory-spec performance and protects downstream components like the compressor from damaging low-voltage starts.

• Specs — Primary (P291-4054): 40+5 MFD (microfarad) | 370–440V rated | Round case | Dual run (compressor + fan) | ±5% factory tolerance | Also cross-references OEM single run capacitors P291-0403 (4 MFD 370V) and P291-1503
• OEM vs. Generic: OEM Carrier capacitors are manufactured to exact factory tolerance and undergo 100% electrical testing. Generic aftermarket units frequently run at ±10% MFD variance, which accelerates motor winding fatigue and can shorten compressor life by months.
• Install Difficulty: 2/5 — Discharge the capacitor fully before touching any terminals — stored charge can cause serious injury. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, and a multimeter to verify discharge. Always photograph the existing wiring before disconnecting terminals (HERM, FAN, C).
• Warranty & Shipping: Backed by a 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse when ordered by cutoff.

Compatibility: Engineered as the direct OEM replacement for Carrier model PY1PJB048130NBAA. Includes dual run capacitor P291-4054 (40+5 MFD 440V round) and cross-references single run capacitors P291-0403 and P291-1503. Always verify MFD rating, voltage, and terminal configuration against your unit's data plate before ordering. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you buy — contact us today.