OEM Carrier Single Run Capacitor P291-1003 for Model FX4ANF030000ACAA

This is the factory-specified OEM single run capacitor (part number P291-1003) for the Carrier FX4ANF030000ACAA fan coil air handler. The run capacitor provides the sustained electrical phase shift that keeps the blower motor running at peak efficiency. When this component fails, the blower motor may hum loudly without starting, run sluggishly, overheat, or cause the system to short-cycle — leaving you with little to no airflow across the coil and reduced system performance.

• Specs: Single run capacitor | Factory-matched MFD rating | 370V or 440V rated (verify on unit data plate) | Round or oval case | ±5% OEM tolerance for precise motor protection
• OEM vs Generic: This OEM unit is manufactured to Carrier's exact electrical specifications. Aftermarket capacitors frequently fall outside acceptable MFD tolerance (±10% or more), causing premature motor wear, increased amp draw, and shortened blower motor life — costing far more in the long run.
• Install Difficulty: 2/5 — Always discharge the capacitor fully before touching terminals; a charged capacitor can deliver a dangerous shock. Tools needed: 1/4" nut driver, needle-nose pliers, and a multimeter to confirm discharge and verify capacitance. Photograph all wire connections before removal to ensure correct reinstallation.
• Warranty: Backed by a 1-year OEM factory warranty. In-stock and ships same business day from our warehouse so your system is back up and running fast.

Compatibility: Designed as a direct OEM replacement for the Carrier FX4ANF030000ACAA fan coil air handler. Always confirm the MFD rating and voltage printed on your existing capacitor or unit data plate before ordering to ensure a proper match. Our fitment specialists are available to verify compatibility before you purchase — just reach out before placing your order.