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This is the factory-specified OEM single run capacitor (part number P291-1003) for the Carrier FA4ANF042015ABAA air handler. The run capacitor provides the continuous phase-shifted current required to keep the blower motor running at peak efficiency. When this component fails, the blower motor may hum without starting, run sluggishly, overheat, or shut down entirely — leaving your system unable to move conditioned air through the home. Replacing it promptly protects the motor from burnout caused by sustained low-voltage draw.
Compatibility: Designed as a direct OEM replacement for the Carrier FA4ANF042015ABAA fan coil air handler. Always verify the MFD rating and voltage printed on your existing capacitor or the unit's data plate before ordering to confirm fitment. Not sure if this part fits your system? Our HVAC parts specialists verify fitment before you buy — contact us before placing your order.