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OEM Carrier Dual Run Capacitor 45+5 MFD 440V for PY4GNAB42090NA
OEM Carrier Dual Run Capacitor 45+5 MFD 440V for PY4GNAB42090NA
OEM Carrier Dual Run Capacitor 45+5 MFD 440V for PY4GNAB42090NA
OEM Carrier Dual Run Capacitor 45+5 MFD 440V for PY4GNAB42090NA
Carrier

OEM Carrier Dual Run Capacitor 45+5 MFD 440V for PY4GNAB42090NA

SKU: CARRIE-PY4GNAB42090NA-CAPACITOR-P291-4554RS Brand: Carrier
✓ Guaranteed to fit PY4GNAB42090NA — or your money back. Terms

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

OEM Carrier Dual Run Capacitor 45+5 MFD 440V for Model PY4GNAB42090NA

This is the genuine OEM replacement dual run capacitor for the Carrier PY4GNAB42090NA split-system air conditioner, carrying OEM part number P291-4554RS. The dual run capacitor serves a critical role in your system — it simultaneously powers the compressor (45 MFD) and condenser fan motor (5 MFD), providing the electrical boost needed to start and sustain both motors during every cooling cycle. When this capacitor begins to fail, common symptoms include the outdoor unit humming but not starting, the condenser fan spinning slowly or not at all, the compressor short-cycling within minutes of startup, or the system tripping the breaker repeatedly. Left unaddressed, a weak or failed capacitor places enormous strain on the compressor — one of the most expensive components in the system.

  • Specs: 45+5 MFD (microfarad) | 440V rated | Round case | ±6% tolerance | 50/60 Hz | 10,000 AFC | Castor oil protected | No-PCB construction | Height: 3-15/16" | Diameter: 2-7/16"
  • OEM vs Generic: This is a genuine Carrier OEM capacitor — factory-matched to exact MFD and voltage tolerances for the PY4GNAB42090NA. Generic aftermarket capacitors often carry a wider ±10% MFD tolerance, which accelerates motor winding wear and can shorten compressor life significantly.
  • Install difficulty: 2/5 — Always discharge the old capacitor before touching terminals (use an insulated screwdriver across terminals). Tools needed: 1/4" nut driver, needle-nose pliers, multimeter. Photograph all wiring before disconnecting. Match HERM, FAN, and COMMON terminal labels precisely.
  • Warranty: 1-year OEM manufacturer warranty against defects. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed for the Carrier PY4GNAB42090NA split-system air conditioner. Also replaces legacy Carrier part numbers HC98KA046 and 319186-702. Always verify the MFD rating and voltage on your unit's data plate before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you buy — just reach out before placing your 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 $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 PY4GNAB42090NA?
Yes. This is the factory-specified OEM capacitor for the Carrier PY4GNAB42090NA. 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 PY4GNAB42090NA?
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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