What MFD capacitor do I need for my Goodman AC?

The correct replacement for Goodman model OEM Goodman 30/5 MFD 440V Run Capacitor WGHP4418AAE—CAP050300440RSS is this exact part. It is the factory-specified replacement with exact OEM specifications. Using a part with different specifications can cause equipment damage or void your warranty. You can verify this by checking the data plate on your Goodman equipment which lists the model number OEM Goodman 30/5 MFD 440V Run Capacitor WGHP4418AAE—CAP050300440RSS.

My AC hums but will not start. What part do I need?

An AC that hums but will not start is the classic symptom of a failed capacitor. The capacitor provides the electrical boost needed to start the compressor and fan motors. When it fails, you hear the hum of the motor trying to start but it cannot overcome inertia. Other symptoms include the fan spinning slowly, the AC cycling on and off rapidly, or a visibly swollen or leaking capacitor. Replacement cost: $15 to $80 for the part, DIY in 30 minutes.

Is this capacitor compatible with Bryant or Payne systems too?

Many Goodman parts are cross-compatible with Bryant and Payne systems since all three brands are manufactured by Carrier Global Corporation. The same physical part is often used across multiple brand labels with different model numbers. To verify cross-compatibility, check your Bryant or Payne equipment service manual for cross-compatible part numbers, or contact info@nationalhvacparts.com with your model number for confirmation.

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Goodman

OEM Goodman 30/5 MFD 440V Run Capacitor WGHP4418AAE—CAP050300440RSS

Name: OEM Goodman 30/5 MFD 440V Run Capacitor WGHP4418AAE—CAP050300440RSS
Brand: Goodman
SKU: GOODMAN-907
Price: 17.95 USD
Availability: InStock

SKU: GOODMAN-907 Brand: Goodman

$17.95 $24.23

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Goodman CAP050300440RSS 30/5 MFD 440V Dual Run Capacitor

The Goodman CAP050300440RSS is a dual run capacitor rated at 30/5 MFD and 440 volts, designed for the WGHP4418AAE air conditioner. It delivers the start-and-run phase shift for both the compressor (30 MFD) and condenser fan motor (5 MFD) in a single round can. A weak or bulged capacitor is the #1 cause of a humming unit that won't start, a fan that won't spin, or a compressor that trips on overload.

Specifications

OEM Part Number: CAP050300440RSS
Capacitance: 30/5 MFD (µF) dual rating
Voltage: 440 VAC (also compatible with 370V applications)
Shape: Round can
Brand: Goodman
Compatible Model: WGHP4418AAE
Terminals: HERM / FAN / C quick-connect

OEM vs. Generic

The OEM capacitor matches Goodman's exact tolerance and 440V rating for maximum lifespan. Generic capacitors with equivalent 30/5 MFD ratings work well and cost less — just verify the µF values and voltage meet or exceed spec. Both options are reliable when correctly matched.

Installation Difficulty

Moderate — disconnect power and discharge the old capacitor before removal to avoid shock. Photograph the wiring, transfer leads to matching HERM/FAN/C terminals, and secure with the strap. Pro recommended if unfamiliar with capacitor discharge safety.

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

OEM Goodman 30/5 MFD 440V Run Ca...

$17.95

Frequently Asked Questions

Does this Capacitor fit my Goodman OEM Goodman 30/5 MFD 440V Run Capacitor WGHP4418AAE—CAP050300440RSS?

Yes. This is the factory-specified OEM capacitor for the Goodman OEM Goodman 30/5 MFD 440V Run Capacitor WGHP4418AAE—CAP050300440RSS. 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 Goodman OEM Goodman 30/5 MFD 440V Run Capacitor WGHP4418AAE—CAP050300440RSS?

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 Goodman 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 Goodman 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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