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OEM Carrier Single Run Capacitor 4 MFD 370V — PY2PNB048090AA
Carrier

OEM Carrier Single Run Capacitor 4 MFD 370V — PY2PNB048090AA

SKU: CARRIE-PY2PNB048090AA-CAPACITOR-P291-0403 Brand: Carrier
✓ Guaranteed to fit PY2PNB048090AA — or your money back. Terms

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Texas CMBL #19328542014
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OEM Carrier Single Run Capacitor 4 MFD 370V for Model PY2PNB048090AA

This OEM single run capacitor is the factory-specified replacement for the Carrier PY2PNB048090AA packaged unit. The run capacitor provides the phase-shifted electrical current needed to keep the condenser fan motor or compressor running efficiently at full speed. When this capacitor weakens or fails, you'll notice symptoms such as a humming condenser with no motor spin, tripped breakers, hard-starting, or warm air coming from your vents — all signs that the unit is struggling to maintain motor torque.

  • Specs: 4 MFD (microfarad) | 370 VAC rated | Oval case | OEM part numbers P291-0403 and P291-1503 | Cross-reference: 97F5704
  • OEM vs Generic: This is a genuine Carrier OEM capacitor built to exact factory tolerance (±5% MFD). Aftermarket alternatives often carry a ±10% tolerance, which can cause premature motor wear and shorten compressor life over time.
  • Install difficulty: 2/5 — Always discharge the capacitor before handling any terminals. Tools needed: flathead or Phillips screwdriver, needle-nose pliers, multimeter (to verify discharge). Photograph existing wiring before disconnecting. Match MFD and voltage ratings exactly before installation.
  • Warranty: 1-year OEM manufacturer warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed to fit the Carrier PY2PNB048090AA packaged unit. Always verify the MFD and voltage rating on your unit's data plate before ordering. Note: P291-0403 has been superseded in some distributions by P291-0404 — our team will confirm correct fitment before your order ships. Have questions? Contact our HVAC parts specialists for free fitment verification.

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 Single Run Capacitor 4 MFD 370V — PY2PNB048090AA?
Yes. This is the factory-specified OEM capacitor for the Carrier OEM Carrier Single Run Capacitor 4 MFD 370V — PY2PNB048090AA. 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 Single Run Capacitor 4 MFD 370V — PY2PNB048090AA?
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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