What MFD capacitor do I need for my Carrier AC?

The correct replacement for Carrier model PY3PPA048115AA 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 PY3PPA048115AA.

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.

Carrier

OEM Carrier Single Run Capacitor 4 MFD 370V for PY3PPA048115AA

Name: OEM Carrier Single Run Capacitor 4 MFD 370V for PY3PPA048115AA
Brand: Carrier
SKU: CARRIE-PY3PPA048115AA-CAPACITOR-P291-0403
Price: 17.00 USD
Availability: InStock

SKU: CARRIE-PY3PPA048115AA-CAPACITOR-P291-0403 Brand: Carrier

✓ Guaranteed to fit PY3PPA048115AA — or your money back. Terms

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OEM Carrier Single Run Capacitor 4 MFD 370V for Model PY3PPA048115AA

This is the factory OEM single run capacitor for Carrier model PY3PPA048115AA packaged HVAC equipment, sold under OEM part numbers P291-0403 (4 MFD 370V) and P291-1503 (15 MFD 370V). A run capacitor stays in circuit continuously during compressor and fan motor operation, supplying the sustained phase-shifted current needed to keep motors running efficiently. When a run capacitor degrades or fails, you'll typically experience symptoms such as a humming unit that won't fully start, a condenser fan that spins slowly or not at all, or a system that short-cycles and trips on thermal overload shortly after startup.

Specs (P291-0403): 4 MFD (microfarad) | 370 VAC | Oval case | Single run | Factory-matched tolerance — also cross-references GE/Genteq C304L, 27L571, 97F5704, HC90AA004, HC91CA004, HC90AB004
OEM vs Generic: Genuine Carrier/Totaline capacitors are subjected to 100% electrical testing and feature a UL-approved, patented pressure-sensitive interrupter for internal fault protection. Generic units often skip individual testing and use lower-grade dielectric film, increasing the risk of premature failure and motor damage.
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, multimeter set to capacitance. Always photograph existing wiring before disconnecting. Verify MFD and voltage ratings on the unit's data plate before installation.
Warranty: 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our warehouse.

Compatibility: Designed as the factory-specified replacement for Carrier PY3PPA048115AA packaged HVAC equipment. This listing covers OEM part numbers P291-0403 (4 MFD 370V) and P291-1503 (15 MFD 370V) — confirm your unit's data plate MFD rating before ordering to ensure correct fitment. Note: Carrier sources its capacitors from manufacturers such as Totaline/Genteq; the label on the capacitor will reflect the component manufacturer's name. Questions about fitment? Our technical team verifies compatibility before you order — in stock and ships today.

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...

$17.00

Frequently Asked Questions

Does this Capacitor fit my Carrier PY3PPA048115AA?

Yes. This is the factory-specified OEM capacitor for the Carrier PY3PPA048115AA. 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 PY3PPA048115AA?

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 4 MFD 370V for PY3PPA048115AA

OEM Carrier Single Run Capacitor 4 MFD 370V for Model PY3PPA048115AA

Shipping Information

Return Policy

Frequently Asked Questions