What MFD capacitor do I need for my Carrier AC?

The correct replacement for Carrier model FA4ANC042008AAAA is this exact part. It is the factory-specified replacement with exact OEM specifications. Using a part with different specifications can cause equipment damage or void your warranty. You can verify this by checking the data plate on your Carrier equipment which lists the model number FA4ANC042008AAAA.

My AC hums but will not start. What part do I need?

An AC that hums but will not start is the classic symptom of a failed capacitor. The capacitor provides the electrical boost needed to start the compressor and fan motors. When it fails, you hear the hum of the motor trying to start but it cannot overcome inertia. Other symptoms include the fan spinning slowly, the AC cycling on and off rapidly, or a visibly swollen or leaking capacitor. Replacement cost: $15 to $80 for the part, DIY in 30 minutes.

Is this capacitor compatible with Bryant or Payne systems too?

Many Carrier parts are cross-compatible with Bryant and Payne systems since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across multiple brand labels with different model numbers. To verify cross-compatibility, check your Bryant or Payne equipment service manual for cross-compatible part numbers, or contact info@nationalhvacparts.com with your model number for confirmation.

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OEM Carrier Single Run Capacitor P291-1003 for FA4ANC042008AAAA

Name: OEM Carrier Single Run Capacitor P291-1003 for FA4ANC042008AAAA
Brand: Carrier
SKU: CARRIE-FA4ANC042008AAAA-CAPACITOR-P291-1003
Price: 20.00 USD
Availability: InStock

SKU: CARRIE-FA4ANC042008AAAA-CAPACITOR-P291-1003 Brand: Carrier

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OEM Carrier Single Run Capacitor P291-1003 for Model FA4ANC042008AAAA

This OEM single run capacitor (part number P291-1003) is the factory-specified replacement for the Carrier FA4ANC042008AAAA air handler. The run capacitor provides the sustained electrical phase shift that keeps the blower motor running at proper torque and efficiency. When this capacitor degrades or fails, you'll notice symptoms such as a humming blower motor that won't spin up, intermittent blower operation, the system tripping on thermal overload, or a complete no-start condition on the indoor fan — all of which can cascade into coil freeze-ups or compressor strain if left unaddressed.

Specs: Single run capacitor | OEM part number P291-1003 | Factory-matched MFD and voltage rating | Round or oval case per OEM specification | ±5% tolerance for reliable motor protection
OEM vs Generic: This is a genuine Carrier OEM capacitor, manufactured to exact factory tolerances. Generic alternatives often carry ±10% MFD variance, which accelerates blower motor winding wear and reduces equipment lifespan — particularly critical in air handler applications where the blower runs continuously.
Install Difficulty: 2/5 — Discharge the capacitor fully before handling any terminals (use an insulated resistor or discharge tool). Tools needed: 1/4" nut driver, needle-nose pliers, and a multimeter to confirm discharge. Always photograph existing wiring before disconnecting terminals. Capacitor is typically located in the control box or blower compartment of the air handler.
Warranty & Shipping: Backed by a 1-year OEM factory warranty against defects. In stock and ships same business day from our climate-controlled warehouse — get your system back online fast.

Compatibility: Engineered specifically for the Carrier FA4ANC042008AAAA fan coil air handler. Always verify the MFD rating and voltage on your existing capacitor's label or the unit's data plate before ordering to confirm an exact match. Not sure? Our HVAC parts specialists verify fitment before you buy — contact us and we'll confirm compatibility with your unit's serial and model number.

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 info@nationalhvacparts.com to initiate a return
Refunds processed within 5-7 business days

OEM Carrier Single Run Capacitor...

$20.00

Frequently Asked Questions

Does this Capacitor fit my Carrier FA4ANC042008AAAA?

Yes. This is the factory-specified OEM capacitor for the Carrier FA4ANC042008AAAA. 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 capacitor on my Carrier FA4ANC042008AAAA?

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 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 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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OEM Carrier Single Run Capacitor P291-1003 for FA4ANC042008AAAA

OEM Carrier Single Run Capacitor P291-1003 for Model FA4ANC042008AAAA

Shipping Information

Return Policy

Frequently Asked Questions