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OEM Carrier Dual Run Capacitor 40+5 MFD 440V — PH1PNB042000AAAA
Carrier

OEM Carrier Dual Run Capacitor 40+5 MFD 440V — PH1PNB042000AAAA

SKU: CARRIE-PH1PNB042000AAAA-CAPACITOR-P291-4054 Brand: Carrier
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Texas CMBL #19328542014
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OEM Carrier Dual Run Capacitor 40+5 MFD 440V for Model PH1PNB042000AAAA

This OEM dual run capacitor (part number P291-4054) is the factory-specified replacement for the Carrier PH1PNB042000AAAA heat pump condenser. The dual run capacitor serves a critical role: it stores and delivers the electrical charge needed to start and sustain both the compressor and the condenser fan motor simultaneously. When this capacitor degrades or fails, you'll typically notice a loud hum with no motor movement, a system that trips off within seconds of starting, or a condenser fan that spins only when manually nudged. A secondary single run capacitor (part number P291-1503) is also used on this model for dedicated fan motor support — verify your unit's wiring diagram to confirm which capacitor requires replacement before ordering.

  • Specs: 40+5 MFD (microfarad) | 370–440V rated | Round case | 50/60 Hz | Factory-matched tolerance | OEM Part # P291-4054 (also referenced as P291-4054RS)
  • OEM vs Generic: OEM capacitors are built to exact factory MFD tolerance specifications. Generic alternatives commonly run at ±10% MFD deviation, which accelerates compressor wear and shortens fan motor life over time. This is a genuine Carrier-sourced capacitor — note that the capacitor body may display the name of the component manufacturer rather than Carrier, which is standard practice.
  • Install difficulty: 2/5 — Always disconnect power at the breaker and wait at least 5 minutes before touching any terminals to allow residual charge to dissipate. Tools needed: 1/4" nut driver, needle-nose pliers, multimeter (capacitance function). Photograph all wiring connections before disconnecting. Terminals are labeled C (common), HERM (compressor), and FAN — reinstall wires to their exact original terminals.
  • Warranty: 1-year OEM manufacturer warranty from date of purchase. In-stock units ship same business day from our warehouse when ordered before cutoff.

Compatibility: Designed for Carrier model PH1PNB042000AAAA heat pump condensers. This listing covers the primary dual run capacitor (P291-4054). A companion single run capacitor (P291-1503) is also available for this model — see our catalog or contact our team for fitment verification. Always confirm MFD rating and voltage on your unit's data plate before ordering. Questions? Our HVAC parts specialists verify fitment 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 OEM Carrier Dual Run Capacitor 40+5 MFD 440V — PH1PNB042000AAAA?
Yes. This is the factory-specified OEM capacitor for the Carrier OEM Carrier Dual Run Capacitor 40+5 MFD 440V — PH1PNB042000AAAA. 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 — PH1PNB042000AAAA?
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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