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OEM Carrier Single Run Capacitor 4 MFD 370V for PY2PNB048115AA
Carrier

OEM Carrier Single Run Capacitor 4 MFD 370V for PY2PNB048115AA

SKU: CARRIE-PY2PNB048115AA-CAPACITOR-P291-0403 Brand: Carrier
✓ Guaranteed to fit PY2PNB048115AA — or your money back. Terms

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OEM Carrier Single Run Capacitor 4 MFD 370V for Model PY2PNB048115AA

This OEM single run capacitor (Part# P291-0403) is the factory-specified replacement for the Carrier PY2PNB048115AA packaged unit. The run capacitor maintains the continuous phase-shifted current required to keep your condenser fan motor or blower motor spinning efficiently. When this capacitor weakens or fails, common symptoms include a motor that hums but refuses to start, intermittent shutdowns on hot days, or a tripped high-pressure safety limit due to reduced airflow. Left unaddressed, a failed run capacitor can overheat and permanently damage an otherwise healthy motor.

  • Specs: 4 MFD (microfarad) | 370V rated | Oval case | 50/60 Hz | Factory-matched ±5% tolerance | Replaces HC90AA004, HC91CA004, HC90AB004
  • OEM vs Generic: This is a genuine Carrier / Totaline OEM capacitor, manufactured to exact factory tolerances. Generic aftermarket units often deviate ±10% MFD, accelerating motor bearing wear and shortening compressor service life. OEM is the correct choice for warranty-covered equipment.
  • Install difficulty: 2/5 — Always discharge the capacitor before handling any terminals. Tools needed: 1/4" nut driver, needle-nose pliers, multimeter (capacitance mode). Photograph all wiring before disconnecting. Note: P291-1503 (15 MFD 370V, secondary run capacitor on this model) has been discontinued — its current successor is P291-1504 (440V, 15 MFD).
  • Warranty: 1-year OEM factory warranty. In-stock and ships the same business day from our warehouse.

Compatibility: Fits Carrier model PY2PNB048115AA packaged HVAC unit. Verify the MFD and voltage rating on your unit's data plate before ordering. This listing is for the primary P291-0403 (4 MFD 370V) single run capacitor. A second run capacitor on this unit uses Part# P291-1503 / P291-1504 (15 MFD). Have a fitment question? Our HVAC parts specialists verify compatibility before you order — reach out before you buy.

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

Frequently Asked Questions

Does this Capacitor fit my Carrier PY2PNB048115AA?
Yes. This is the factory-specified OEM capacitor for the Carrier PY2PNB048115AA. 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 PY2PNB048115AA?
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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Mike Rivera
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