OEM Carrier Single Run Capacitor 4 MFD 370V for Model PY2PNB048090AA

This OEM single run capacitor is the factory-specified replacement for the Carrier PY2PNB048090AA packaged unit. The run capacitor provides the phase-shifted electrical current needed to keep the condenser fan motor or compressor running efficiently at full speed. When this capacitor weakens or fails, you'll notice symptoms such as a humming condenser with no motor spin, tripped breakers, hard-starting, or warm air coming from your vents — all signs that the unit is struggling to maintain motor torque.

• Specs: 4 MFD (microfarad) | 370 VAC rated | Oval case | OEM part numbers P291-0403 and P291-1503 | Cross-reference: 97F5704
• OEM vs Generic: This is a genuine Carrier OEM capacitor built to exact factory tolerance (±5% MFD). Aftermarket alternatives often carry a ±10% tolerance, which can cause premature motor wear and shorten compressor life over time.
• Install difficulty: 2/5 — Always discharge the capacitor before handling any terminals. Tools needed: flathead or Phillips screwdriver, needle-nose pliers, multimeter (to verify discharge). Photograph existing wiring before disconnecting. Match MFD and voltage ratings exactly before installation.
• Warranty: 1-year OEM manufacturer warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed to fit the Carrier PY2PNB048090AA packaged unit. Always verify the MFD and voltage rating on your unit's data plate before ordering. Note: P291-0403 has been superseded in some distributions by P291-0404 — our team will confirm correct fitment before your order ships. Have questions? Contact our HVAC parts specialists for free fitment verification.