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OEM Carrier Single Run Capacitor 4 MFD 370V for PY1REA048115AAWA
Carrier

OEM Carrier Single Run Capacitor 4 MFD 370V for PY1REA048115AAWA

SKU: CARRIE-PY1REA048115AAWA-CAPACITOR-P291-0403 Brand: Carrier
✓ Guaranteed to fit PY1REA048115AAWA — or your money back. Terms

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OEM Carrier Single Run Capacitor 4 MFD 370V for Model PY1REA048115AAWA

This is the factory-specified OEM single run capacitor for the Carrier PY1REA048115AAWA packaged unit. The run capacitor remains in the electrical circuit the entire time the fan motor or compressor is operating, providing the phase-shifted current needed to keep the motor running efficiently. When this capacitor weakens or fails, you'll typically notice symptoms such as a humming sound with no motor startup, warm air blowing from the system, or the unit short-cycling and shutting off shortly after starting. Replacing it promptly prevents cascading damage to the motor windings.

  • Specs: 4 MFD (microfarad) | 370 VAC rated | Oval case form factor | ±5% factory tolerance | 50/60 Hz | RoHS compliant
  • OEM vs Generic: This is a genuine Carrier/Totaline OEM part (P291-0403) manufactured to exact factory tolerances. Generic capacitors often carry a ±10% MFD tolerance, which can accelerate motor wear and shorten equipment life — especially critical in a packaged unit where motor replacement is labor-intensive.
  • Install difficulty: 2/5 — Disconnect power and allow the capacitor to fully discharge before handling. Tools needed: 1/4" nut driver, needle-nose pliers, and a multimeter (to verify discharge). Always photograph or label wire positions before removal. The oval case mounts in the existing bracket with no modification required.
  • Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Engineered as a direct OEM replacement for Carrier model PY1REA048115AAWA. Also cross-references secondary OEM part number P291-1503 (15 MFD 370V single run capacitor) — verify the MFD and voltage ratings on your unit's data plate before ordering to confirm which capacitor position you are replacing. Questions about fitment? Our HVAC parts team verifies compatibility before you order — contact us today. In stock — 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

Frequently Asked Questions

Does this Capacitor fit my Carrier PY1REA048115AAWA?
Yes. This is the factory-specified OEM capacitor for the Carrier PY1REA048115AAWA. 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 PY1REA048115AAWA?
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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