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OEM Carrier Dual Run Capacitor 45+5 MFD 370V for PY2PNB030040NB
Carrier

OEM Carrier Dual Run Capacitor 45+5 MFD 370V for PY2PNB030040NB

SKU: CARRIE-PY2PNB030040NB-CAPACITOR-P291-4553 Brand: Carrier
✓ Guaranteed to fit PY2PNB030040NB — 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 370V for Model PY2PNB030040NB

This is the OEM factory-specified dual run capacitor for the Carrier PY2PNB030040NB split-system air conditioner and heat pump condenser. The dual run capacitor stores and releases the electrical charge required to start and sustain both the compressor and the condenser fan motor during every cooling cycle. When this capacitor degrades or fails, you'll typically hear a low hum with no compressor or fan motor starting, experience intermittent short-cycling, or notice the outdoor unit attempting to start but immediately tripping off. Left unaddressed, a weak capacitor accelerates wear on both the compressor and fan motor windings — often turning a low-cost part swap into a far more expensive repair.

  • Specs: 45+5 MFD (microfarad) | 370 VAC rated | Oval case | 50/60 Hz | ±5% factory tolerance | OEM Part Numbers: P291-4553 (superseded by P291-4554), with associated single run capacitors P291-0403 and P291-1503
  • OEM vs Generic: This is a genuine Carrier/Totaline OEM capacitor — not an aftermarket substitute. Generic capacitors frequently run ±10% MFD tolerance, which increases electrical stress on compressor and motor windings and shortens component life. OEM units are built to the exact factory specification for the PY2PNB030040NB platform.
  • Install Difficulty: 2/5 — Capacitors store a lethal charge even after power is disconnected. Always discharge the capacitor with an insulated resistor tool before touching any terminals. Tools needed: 1/4" nut driver, needle-nose pliers, insulated discharge tool, multimeter. Photograph all wiring connections before removing the old unit.
  • Warranty & Shipping: Backed by a 1-year OEM factory warranty. In stock and ships same business day from our warehouse — order by 3 PM local time for guaranteed same-day dispatch.

Compatibility: Designed for the Carrier PY2PNB030040NB condenser. Cross-references OEM part numbers P291-4553, P291-4554 (current successor SKU), P291-0403, and P291-1503. Always verify the MFD rating and voltage printed on your existing capacitor's label against this listing before ordering. Have a fitment question? Our HVAC parts specialists confirm compatibility before you buy — reach out via chat or phone.

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 PY2PNB030040NB?
Yes. This is the factory-specified OEM capacitor for the Carrier PY2PNB030040NB. 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 PY2PNB030040NB?
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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