What MFD capacitor do I need for my Goodman AC?

The correct replacement for Goodman model GMT135-5 — B94577500 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 GMT135-5 — B94577500.

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 60/5 MFD 370V Run Capacitor for GMT135-5 — B94577500

Name: OEM Goodman 60/5 MFD 370V Run Capacitor for GMT135-5 — B94577500
Brand: Goodman
SKU: GOODMAN-12451
Price: 19.95 USD
Availability: InStock

SKU: GOODMAN-12451 Brand: Goodman

$19.95 $25.95

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Goodman B94577500 60/5 MFD 370V Dual Run Capacitor

The Goodman B94577500 is a genuine OEM dual run capacitor rated at 60/5 MFD, 370 volts, designed as a direct replacement for GMT135-5 equipment. A dual run capacitor delivers a steady phase-shifted current to both the compressor (60 MFD side) and the condenser fan motor (5 MFD side), keeping both motors running efficiently. A weak or failed capacitor is the single most common cause of a unit that hums but won't start, trips the breaker, or runs hot.

Specifications

OEM Part Number: B94577500
Capacitance: 60/5 MFD (µF)
Voltage: 370 VAC
Type: Dual run capacitor (compressor + fan)
Tolerance: ±6%
Compatibility: Goodman GMT135-5

OEM vs. Generic

OEM capacitors are held to tighter capacitance tolerance and voltage ratings, which directly affects motor efficiency and lifespan. A 440V generic can substitute for a 370V rating, but off-spec MFD values cause motors to draw excess current and overheat. Matching the OEM 60/5 MFD spec guarantees correct performance.

Installation Difficulty: Easy

A common DIY-friendly repair for those comfortable working safely around electrical components. Always disconnect power and discharge the old capacitor before removal — stored charge can shock. Photograph the wiring, transfer leads one terminal at a time (HERM, FAN, C), and secure with the strap. Typically a 15-minute job.

Fits Goodman GMT135-5. Confirm MFD and voltage against your existing capacitor before ordering.

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 60/5 MFD 370V Run Ca...

$19.95

Frequently Asked Questions

Does this Capacitor fit my Goodman GMT135-5 — B94577500?

Yes. This is the factory-specified OEM capacitor for the Goodman GMT135-5 — B94577500. 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 GMT135-5 — B94577500?

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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