What MFD capacitor do I need for my Carrier AC?

The correct replacement for Carrier model PF4MNA030000AAAA 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 PF4MNA030000AAAA.

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 PF4MNA030000AAAA

Name: OEM Carrier Single Run Capacitor P291-1003 for PF4MNA030000AAAA
Brand: Carrier
SKU: CARRIE-PF4MNA030000AAAA-CAPACITOR-P291-1003
Price: 20.00 USD
Availability: InStock

SKU: CARRIE-PF4MNA030000AAAA-CAPACITOR-P291-1003 Brand: Carrier

✓ Guaranteed to fit PF4MNA030000AAAA — or your money back. Terms

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OEM Carrier Single Run Capacitor P291-1003 for Model PF4MNA030000AAAA

This OEM single run capacitor (part number P291-1003) is the factory-specified replacement for the Carrier PF4MNA030000AAAA fan coil/air handler unit. The run capacitor provides a continuous phase-shifted current to keep the blower or condenser fan motor running smoothly at full efficiency. When a single run capacitor fails, the motor it serves loses torque, draws excess amperage, and will typically hum without starting — or overheat and trip its thermal overload. Left unaddressed, a failed capacitor will shorten motor life significantly.

Part Specs: OEM single run capacitor | Factory-matched MFD rating and voltage | Round or oval case per factory spec | Rated tolerance within ±3% for precise motor protection — verify your unit's data plate for exact MFD and voltage before ordering
OEM vs. Generic: This is a genuine Carrier OEM component manufactured to exact factory tolerances. Generic capacitors often deviate ±10% MFD from spec, increasing motor operating temperature and accelerating winding failure — a false economy that risks a far more expensive motor replacement.
Install Difficulty: 2/5 — A straightforward swap, but safety is critical. Always disconnect power at the breaker before opening the unit. Discharge the capacitor fully using an insulated resistor before touching terminals. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, and a multimeter to verify the old capacitor has failed. Photograph all wiring connections before removal.
Warranty & Shipping: Backed by a 1-year OEM factory warranty against defects. In stock and ships same business day from our warehouse so your system is back up fast.

Compatibility: Engineered as a direct OEM replacement for the Carrier PF4MNA030000AAAA. Always cross-reference the MFD rating and voltage printed on your existing capacitor or the unit data plate before ordering to confirm fitment. Our HVAC parts specialists are available to verify compatibility before you buy — just reach out before placing your order.

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 $99
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 PF4MNA030000AAAA?

Yes. This is the factory-specified OEM capacitor for the Carrier PF4MNA030000AAAA. 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 PF4MNA030000AAAA?

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 PF4MNA030000AAAA

OEM Carrier Single Run Capacitor P291-1003 for Model PF4MNA030000AAAA

Shipping Information

Return Policy

Frequently Asked Questions