What MFD capacitor do I need for my Goodman AC?

The correct replacement for Goodman model WFD18115S5CXCB — CAP250000370RPS 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 WFD18115S5CXCB — CAP250000370RPS.

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 25 MFD 370V Run Capacitor for WFD18115S5CXCB — CAP250000370RPS

Name: OEM Goodman 25 MFD 370V Run Capacitor for WFD18115S5CXCB — CAP250000370RPS
Brand: Goodman
SKU: GOODMAN-13894
Price: 16.95 USD
Availability: InStock

SKU: GOODMAN-13894 Brand: Goodman

$16.95 $22.95

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The Goodman CAP250000370RPS 25 MFD 370V Run Capacitor is a genuine OEM replacement for the Goodman WFD18115S5CXCB furnace and compatible models. The run capacitor supplies the phase-shifted current that keeps the blower or condenser motor turning efficiently. A weak or bulging capacitor causes hard starts, humming, overheating motors, and eventual motor failure — testing below 23.75 MFD means it's time to replace.

Specifications

Part Number: CAP250000370RPS (OEM Goodman)
Capacitance: 25 MFD (µF)
Voltage Rating: 370 VAC
Type: Round run capacitor, motor-rated
Tolerance: ±6%
Fits Model: WFD18115S5CXCB

OEM vs. Generic

The OEM CAP250000370RPS is rated to the exact 25 MFD / 370V spec with factory tolerance and terminal layout, dropping straight into the mounting strap. Generic capacitors vary in tolerance and can be over- or under-sized, stressing the motor over time. A 370V-rated cap is fully compatible in 370V circuits; matching the microfarad value exactly is what protects your motor.

Installation Difficulty

Easy — 2 out of 5. A capacitor swap takes about 15 minutes. Critical: disconnect power and discharge the capacitor across its terminals with an insulated screwdriver before touching it — stored charge can shock you. Photograph the wiring, transfer leads one at a time, and secure the mounting strap. If unsure, use a licensed HVAC technician.

Backed by our fit guarantee. Questions? info@nationalhvacparts.com.

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 25 MFD 370V Run Capa...

$16.95

Frequently Asked Questions

Does this Capacitor fit my Goodman WFD18115S5CXCB — CAP250000370RPS?

Yes. This is the factory-specified OEM capacitor for the Goodman WFD18115S5CXCB — CAP250000370RPS. 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 WFD18115S5CXCB — CAP250000370RPS?

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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