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OEM Carrier Dual Run Capacitor 40+5 MFD 440V — HC1AJX048000AAAA
Carrier

OEM Carrier Dual Run Capacitor 40+5 MFD 440V — HC1AJX048000AAAA

SKU: CARRIE-HC1AJX048000AAAA-CAPACITOR-P291-4054RS Brand: Carrier

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OEM Carrier Dual Run Capacitor 40+5 MFD 440V for Model HC1AJX048000AAAA

This OEM dual run capacitor (part number P291-4054RS) is the factory-specified replacement for the Carrier HC1AJX048000AAAA 4-ton split-system air conditioner. The dual run capacitor provides the start and run boost required by both the compressor and condenser fan motor within a single round case. When this component fails, you'll typically notice a loud humming with no motor movement, a system that trips the breaker shortly after startup, or a condenser fan that spins only when manually assisted — all signs of imminent compressor damage if left unaddressed.

  • Specs: 40+5 MFD (microfarad) | 440V rated | Round case | OEM part number P291-4054RS | Factory-matched ±3% tolerance for precise motor performance
  • OEM vs Generic: This is a genuine OEM Carrier capacitor engineered to exact factory tolerances. Aftermarket units commonly run ±10% MFD deviation, which accelerates compressor and fan motor wear, voids equipment warranties, and shortens overall system life.
  • Install difficulty: 2/5 — Always discharge the capacitor fully before handling any terminals. Recommended tools: 1/4" nut driver, needle-nose pliers, insulated discharge resistor, and a multimeter to verify capacitance after installation. Photograph all wiring connections before removal.
  • Warranty: Backed by a 1-year OEM factory warranty. Orders placed before our same-day shipping cutoff leave our warehouse the same business day.

Compatibility: Designed for the Carrier HC1AJX048000AAAA 4-ton split-system condenser. Always cross-reference the MFD rating and voltage printed on your existing capacitor's data label before ordering to confirm an exact match. Our parts specialists are available to verify fitment prior to purchase — don't hesitate to reach out before you order.

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 $75
  • 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 OEM Carrier Dual Run Capacitor 40+5 MFD 440V — HC1AJX048000AAAA?
Yes. This is the factory-specified OEM capacitor for the Carrier OEM Carrier Dual Run Capacitor 40+5 MFD 440V — HC1AJX048000AAAA. 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 OEM Carrier Dual Run Capacitor 40+5 MFD 440V — HC1AJX048000AAAA?
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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