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OEM Carrier Single Run Capacitor 4 MFD 370V for PY1REA036074ABWB
Carrier

OEM Carrier Single Run Capacitor 4 MFD 370V for PY1REA036074ABWB

SKU: CARRIE-PY1REA036074ABWB-CAPACITOR-P291-0403 Brand: Carrier
✓ Guaranteed to fit PY1REA036074ABWB — or your money back. Terms

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OEM Carrier Single Run Capacitor 4 MFD 370V for Model PY1REA036074ABWB

This OEM Carrier single run capacitor (part numbers P291-0403 and P291-1503) is the factory-specified replacement for the Carrier PY1REA036074ABWB packaged unit. A single run capacitor maintains a continuous phase-shifted current to keep the fan motor or compressor running smoothly after startup. When it degrades or fails, you'll typically notice the motor struggling to start, humming without turning, overheating, or the unit shutting down on a high-current fault shortly after energizing.

  • Specs: P291-0403: 4 MFD (microfarad) | 370V rated | Oval case | CBB65-V rated | RoHS compliant — P291-1503: 15 MFD | 370V rated | Oval case | CBB65-V rated | Both are Totaline/Carrier factory-spec components tested to 60,000 service hours
  • OEM vs Generic: These Totaline OEM capacitors are subjected to 100% electrical testing at the factory, including capacitance verification and high-potential withstand testing. Generic capacitors frequently run ±10% MFD tolerance, which accelerates motor winding wear and shortens compressor life over time.
  • Install difficulty: 2/5 — Always discharge the capacitor before handling. Tools needed: 1/4" nut driver, insulated needle-nose pliers, multimeter with capacitance function. Photograph all wiring connections before disconnecting. Match VAC voltage and MFD rating to your unit's data plate before installing.
  • Warranty: 1-year OEM factory warranty. Orders ship same business day from our warehouse.

Compatibility: Fits Carrier model PY1REA036074ABWB. Note: P291-0403 has been superseded by P291-0404 and P291-1503 has been superseded by P291-1504 — all are functionally equivalent direct replacements. Verify MFD and voltage ratings on your unit's data plate before ordering. Our team is available to confirm fitment prior to purchase.

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 PY1REA036074ABWB?
Yes. This is the factory-specified OEM capacitor for the Carrier PY1REA036074ABWB. 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 PY1REA036074ABWB?
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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