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OEM Carrier Single Run Capacitor 7.5 MFD 370V — PF4MNA018000AAAA
Carrier

OEM Carrier Single Run Capacitor 7.5 MFD 370V — PF4MNA018000AAAA

SKU: CARRIE-PF4MNA018000AAAA-CAPACITOR-P291-0753 Brand: Carrier
✓ Guaranteed to fit PF4MNA018000AAAA — or your money back. Terms

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Texas CMBL #19328542014
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OEM Carrier Single Run Capacitor 7.5 MFD 370V for Model PF4MNA018000AAAA

This OEM single run capacitor is the factory-specified replacement for the Carrier PF4MNA018000AAAA fan coil and air handler system. The run capacitor stores and releases the electrical charge needed to keep the blower or condenser fan motor running smoothly and efficiently. When this component fails, you'll typically notice the motor humming without starting, the system short-cycling shortly after startup, or the unit failing to produce airflow entirely — all signs pointing to a failed or weak capacitor that must be replaced to restore normal operation.

  • Specs: 7.5 MFD (microfarad) | 370V rated | Oval case form factor | Factory-matched ±5% tolerance | OEM part number P291-0753 (superseded by P291-0754)
  • OEM vs Generic: OEM capacitors are manufactured to exact Carrier factory tolerances, ensuring proper motor voltage support and longevity. Generic alternatives often carry ±10% MFD variance, which can cause premature motor wear and compressor stress over time.
  • Install difficulty: 2/5 — Always discharge the capacitor completely before touching terminals. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring connections before disconnecting to ensure correct reassembly.
  • Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for use with Carrier model PF4MNA018000AAAA fan coil units. Verify the MFD and voltage ratings on your unit's data plate before ordering to confirm fitment. Note: Carrier sources capacitors from third-party manufacturers (such as Genteq/GE); labeling on the capacitor body will reflect the component manufacturer, not Carrier. Have questions about fitment? Our HVAC parts specialists verify compatibility 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 $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 7.5 MFD 370V — PF4MNA018000AAAA?
Yes. This is the factory-specified OEM capacitor for the Carrier OEM Carrier Single Run Capacitor 7.5 MFD 370V — PF4MNA018000AAAA. 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 7.5 MFD 370V — PF4MNA018000AAAA?
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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