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OEM Lennox Dual Run Capacitor 55+7.5 MFD 440V Round — Y9647
Lennox

OEM Lennox Dual Run Capacitor 55+7.5 MFD 440V Round — Y9647

SKU: LNX-Y9647 Brand: Lennox
$18.95 $24.95

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Texas CMBL #19328542014
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Govt POs Accepted

The Lennox Y9647 is a genuine OEM dual run capacitor rated at 55+7.5 MFD, 440V, in the standard round configuration. It provides the correct running current to both the compressor (55 MFD side) and the outdoor condenser fan motor (7.5 MFD side) of your Lennox air conditioner or heat pump. Built in the USA to factory tolerances, it delivers the precise capacitance and voltage rating your Lennox system was designed to use.

Common failure symptoms: A degraded Y9647 commonly shows up as a fan motor that won't spin freely, a compressor that buzzes but fails to start, weak or warm airflow, breaker trips on startup, or a physically swollen and leaking capacitor housing. Because capacitors weaken gradually, cooling performance often drops before the unit fails completely.

Why OEM matters: The 55+7.5 MFD rating is specific to the motor loads in your Lennox equipment. A generic substitute with different ratings can overheat windings, reduce efficiency, and shorten compressor life. The OEM Y9647 ensures exact electrical matching, safeguarding your compressor and returning your system to rated performance and efficiency.

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 $75
  • 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 Lennox OEM Lennox Dual Run Capacitor 55+7.5 MFD 440V Round — Y9647?
Yes. This is the factory-specified OEM capacitor for the Lennox OEM Lennox Dual Run Capacitor 55+7.5 MFD 440V Round — Y9647. 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 Lennox OEM Lennox Dual Run Capacitor 55+7.5 MFD 440V Round — Y9647?
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 Lennox 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 Lennox 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
HVAC Parts Specialist — Online