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OEM Carrier Run Capacitor P291-3543 for Model FA4CNC018010AAAA

SKU: carrier-run-capacitor-fa4cnc018010aaaa Brand: Carrier
$24.95

Order before 3PM CST — ships same day.
Standard delivery 2-5 business days. Express options at checkout.

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OEM Carrier Run Capacitor P291-3543 for Model FA4CNC018010AAAA

Maintain strong, steady airflow from your Carrier FA4CNC018010AAAA fan coil with this genuine OEM run capacitor (P291-3543). The run capacitor delivers the continuous phase shift the blower motor relies on to start and run efficiently. When its microfarad rating drifts or it fails outright, you'll typically notice a humming motor that won't turn, weak airflow, or a unit that trips on overload. This factory-spec replacement provides the precise capacitance and voltage rating Carrier engineered for the FA4CNC series, ensuring proper motor amperage draw and protecting against premature burnout. Installation is straightforward for a qualified technician: cut power, safely discharge the existing capacitor, note the terminal wiring, and connect the new unit. Choosing the OEM part over a universal capacitor removes the risk of mismatched MFD or voltage that can destroy a costly motor. Orders placed before 3PM CST ship the same business day, getting cool air flowing again quickly. Genuine Carrier quality and our fast fulfillment make this a repair you can trust.

Compatibility

This part is compatible with Carrier model FA4CNC018010AAAA.

Shipping

Same-day shipping before 3 PM CST. 30-day returns on uninstalled parts.

Shipping Information

  • Orders placed before 3PM CST ship same business day
  • Standard delivery: 2-5 business days
  • Express shipping available at checkout
  • Free shipping on orders over $75
  • Tracking number emailed upon shipment

Return Policy

  • 30-day returns on unused parts in original packaging
  • Electrical parts (capacitors, contactors, control boards) are final sale once installed
  • Email support@nationalhvacparts.com to initiate a return
  • Refunds processed within 5-7 business days

Frequently Asked Questions

Does this Run Capacitor fit my Carrier Model FA4CNC018010AAAA?
Yes. This is the factory-specified OEM run capacitor for the Carrier Model FA4CNC018010AAAA. It is a direct drop-in replacement that fits without modification. Always verify the model number on your equipment nameplate before ordering.
How do I replace the run capacitor on my Carrier Model FA4CNC018010AAAA?
Difficulty: Easy (20–30 min)
Step 1: Turn off power at breaker. Step 2: Open condensing unit panel. Step 3: Photograph the old capacitor wiring (Common/Herm/Fan). Step 4: Discharge old capacitor with insulated screwdriver. Step 5: Disconnect and remove old capacitor. Step 6: Mount new capacitor, reconnect wires to matching terminals. Step 7: Close panel, restore power, test. Tools: screwdriver, needle-nose pliers.
My AC hums but won’t start. What part do I need?
An AC that hums but won’t start is the classic symptom of a failed capacitor. The capacitor provides the electrical boost to start the compressor. When it fails, you hear humming but the motor can’t overcome inertia. Other symptoms: fan spinning slowly, AC cycling on/off rapidly, or a visibly swollen capacitor. Fix: replace capacitor ($15–$80 DIY, 30 min).
Is this run capacitor compatible with Bryant or Payne too?
Many Carrier parts are cross-compatible with Bryant and Payne since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across brand labels with different model numbers. To verify: check your Bryant or Payne equipment service manual for cross-compatible part numbers, or email info@nationalhvacparts.com with your model number.
Should I use OEM or aftermarket for my Carrier run capacitor?
OEM strongly recommended. OEM capacitors have ±6% MFD tolerance vs aftermarket ±10%. The looser tolerance causes motor winding stress, higher temps, and shorter compressor life. Price difference is only $10–$20 — OEM is the clear value choice.
How fast does National HVAC Parts ship?
Orders placed before 3:00 PM CST ship the same business day. Standard delivery is 2–5 business days anywhere in the continental United States. Express shipping available at checkout. We ship from Houston, TX to all 50 states. 30-day return policy on all parts.
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