OEM Carrier Single Run Capacitor P291-1003 for Model PG8MAA042090AAJA

This OEM single run capacitor (part number P291-1003) is the factory-specified replacement for the Carrier PG8MAA042090AAJA packaged gas/electric unit. The run capacitor maintains the continuous phase-shifted voltage that keeps the blower or condenser fan motor running smoothly after startup. When this component degrades or fails, you'll notice symptoms such as a humming motor that won't spin, intermittent short-cycling, overheating, or a complete no-start condition — all of which can cascade into compressor or motor damage if left unaddressed.

• Specs: Single run capacitor | Factory-rated MFD and voltage — verify against your unit's data plate | Designed for exact OEM fit and terminal compatibility with Carrier PG8MAA042090AAJA
• OEM vs Generic: This is a genuine OEM Carrier part (P291-1003), manufactured to ±3% MFD tolerance. Aftermarket alternatives commonly run ±10% tolerance, which accelerates motor winding wear and can void equipment warranties.
• Install difficulty: 2/5 — Always discharge the capacitor fully before handling. Tools needed: 1/4" nut driver, insulated needle-nose pliers, multimeter (capacitance mode). Photograph all wiring connections before removal to ensure correct reinstallation.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier PG8MAA042090AAJA packaged gas/electric unit. Always confirm the MFD and voltage rating on your existing capacitor's label or the equipment data plate before ordering. Our HVAC parts specialists are available to verify fitment — order with confidence from NationalHVACParts.com.