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OEM Carrier Single Run Capacitor 4 MFD 370V for PY1PPB030040AAAA
Carrier

OEM Carrier Single Run Capacitor 4 MFD 370V for PY1PPB030040AAAA

SKU: CARRIE-PY1PPB030040AAAA-CAPACITOR-P291-0403 Brand: Carrier
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OEM Carrier Single Run Capacitor 4 MFD 370V for Model PY1PPB030040AAAA (P291-0403 / P291-1503)

This is the factory-specified OEM single run capacitor for the Carrier PY1PPB030040AAAA packaged unit. This unit uses two individual single run capacitors — P291-0403 (4 MFD 370V) for the condenser fan motor and P291-1503 (15 MFD 370V) for the compressor — rather than a combined dual run unit. A run capacitor maintains the continuous phase shift required to keep the motor spinning efficiently. When it degrades or fails, you'll notice symptoms such as a humming motor that won't start, the compressor or fan cycling off shortly after startup, higher-than-normal energy draw, or a complete no-start condition on the affected motor circuit.

  • Specs (P291-0403): 4 MFD (microfarad) | 370 VAC rated | Oval case | ±5% factory tolerance | Replaces OEM P/N HC90AA004, HC91CA004, HC90AB004
  • Specs (P291-1503): 15 MFD (microfarad) | 370 VAC rated | Oval case | ±5% factory tolerance | RoHS Compliant | UL Approved with Pressure Sensitive interrupter
  • OEM vs Generic: These are genuine Carrier Totaline-series capacitors, reliability-tested to 60,000 service hours with high-grade metallized polypropylene film and 100% electrical testing at the factory. Generic alternatives frequently run outside ±5% MFD tolerance, accelerating motor wear and risking compressor damage over time.
  • 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. Match MFD and voltage ratings exactly to your unit's data plate.
  • Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse.

Compatibility: Engineered for the Carrier PY1PPB030040AAAA packaged unit. Verify both the MFD rating and voltage (370V) on your unit's data plate before ordering. Note: P291-0403 has been superseded by P291-0404, and P291-1503 has been superseded by P291-1504 — our stock reflects the current OEM-equivalent specification. Questions about fitment? Our HVAC parts specialists verify compatibility before you order — order now and ship 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 PY1PPB030040AAAA?
Yes. This is the factory-specified OEM capacitor for the Carrier PY1PPB030040AAAA. 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 PY1PPB030040AAAA?
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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