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35+5 MFD 370/440V Dual Run Capacitor — Universal AC Compressor & Fan
National HVAC Parts

35+5 MFD 370/440V Dual Run Capacitor — Universal AC Compressor & Fan

SKU: NHVAC-CAP-GFC18C Brand: National HVAC Parts
$14.99 $20.99

Order before 3PM CST — ships same day.
Standard delivery 2-5 business days. Express options at checkout.

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35+5 MFD dual run capacitor — the larger 35 MFD side powers the compressor, the smaller 5 MFD side powers the condenser fan motor. One capacitor replaces two separate run capacitors, saving space and simplifying wiring.

Rated 370/440V for all residential AC systems. Three terminals: HERM (hermetic/compressor), FAN (condenser fan motor), and COM (common — connects to contactor).

Specifications

  • Capacitance: 35+5 MFD (±6%)
  • Voltage: 370/440 VAC 50/60Hz
  • Terminals: 3-prong — HERM, FAN, COM
  • Shape: Round aluminum canister

Terminal Wiring Guide

HERM → Compressor start winding (usually brown or yellow wire)
FAN → Condenser fan motor (usually brown wire from motor)
COM → Common — connects to contactor (L2 side)

Frequently Asked Questions

How do I know which side is the compressor vs fan?

The LARGER MFD value (35) is always the compressor side. The SMALLER value (5) is the fan motor side. They are labeled on the terminals — HERM goes to the compressor, FAN goes to the fan motor, COM goes to the contactor.

Can I replace a dual cap with two single caps?

Yes — you can use a 35 MFD single cap for the compressor and a 5 MFD single cap for the fan motor. Wire the compressor cap between HERM and COM, and the fan cap between FAN and COM. This is a common emergency repair when the exact dual value isn't available.

What causes a dual run capacitor to fail?

Heat is the #1 killer. Capacitors degrade faster in hot environments — the outdoor condensing unit in Texas summer heat accelerates aging. Electrical surges, short cycling, and simply age (typical life: 5-15 years) also cause failure. Replace proactively if the unit is 10+ years old.

Fitment Guaranteed — if this capacitor doesn't work in your system, we'll send the right one or refund you.

Ships same-day from Houston, TX on orders before 3PM CST.

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 National HVAC Parts 35+5 MFD 370/440V Dual Run Capacitor — Universal AC Compressor & Fan?
Yes. This is the factory-specified OEM capacitor for the National HVAC Parts 35+5 MFD 370/440V Dual Run Capacitor — Universal AC Compressor & Fan. 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 National HVAC Parts 35+5 MFD 370/440V Dual Run Capacitor — Universal AC Compressor & Fan?
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 National HVAC Parts 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 National HVAC Parts 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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