OEM Carrier Dual Run Capacitor P291-4054 for Model PY2PNB024040AA

This OEM dual run capacitor (part number P291-4054) is the factory-specified replacement for the Carrier PY2PNB024040AA split-system unit. The dual run capacitor stores and releases the electrical charge required to start and sustain both the compressor and condenser fan motor simultaneously. Common failure symptoms include a humming condenser with no motor movement, the system short-cycling within the first few minutes of operation, or the condenser fan spinning weakly or not at all. Replacing a failed capacitor promptly protects your compressor from costly burnout due to low-voltage starts.

• Specs: Dual run configuration | Factory-matched MFD rating | 370V/440V rated | Round case | ±5% tolerance per OEM specification — verify your unit's data plate for exact MFD values before ordering
• OEM vs Generic: This listing ships the genuine OEM P291-4054. OEM capacitors are wound to exact factory tolerances, unlike generic alternatives (P291-0403 / P291-1503 single run variants) which can run ±10% MFD, accelerating wear on compressor windings and shortening overall system life.
• Install Difficulty: 2/5 — Always discharge the capacitor fully before removing any terminals. Tools needed: 1/4" nut driver, insulated needle-nose pliers, multimeter (capacitance mode). Photograph all terminal wiring before disconnecting. Observe polarity markings where applicable.
• Warranty & Shipping: Backed by a 1-year OEM factory warranty. In stock and ships same business day from our NationalHVACParts.com warehouse — most orders arrive within 1–3 business days.

Compatibility: Engineered as a direct OEM replacement for the Carrier PY2PNB024040AA. Related single run capacitor part numbers P291-0403 and P291-1503 are also available for individual compressor or fan motor replacement. Always verify MFD rating and voltage on your unit's data plate before ordering. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you buy.