What HP motor do I need for my Goodman unit?

The correct replacement for Goodman model GMT045-3 — B13400251S 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 GMT045-3 — B13400251S.

My AC fan is not spinning. What part do I need?

A fan that does not spin, spins slowly, or makes grinding or squealing noises needs a new motor. Grinding means the bearings have failed. Squealing means the bearings are dry. No spin with a humming sound means the capacitor may be the issue. Check the motor capacitor before replacing the entire motor.

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Goodman

OEM Goodman 1/6 HP Condenser Fan Motor for GMT045-3 — B13400251S

Name: OEM Goodman 1/6 HP Condenser Fan Motor for GMT045-3 — B13400251S
Brand: Goodman
SKU: GOODMAN-B13400251S
Price: 185.95 USD
Availability: InStock

SKU: GOODMAN-B13400251S Brand: Goodman

$185.95 $241.95

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Goodman B13400251S 1/6 HP Condenser Fan Motor

The Goodman B13400251S is a genuine OEM 1/6 HP condenser fan motor engineered for the GMT045-3 and compatible Goodman/Amana outdoor units. This motor spins the condenser fan blade to move air across the coil and reject heat from the system. Symptoms of a failing motor include a hot outdoor unit that won't cool, a humming motor that won't start, hard-starting, or a tripped overload — replacing it restores full cooling capacity and protects the compressor from overheating.

Specifications

Part number: B13400251S
Component type: Condenser (outdoor) fan motor
Horsepower: 1/6 HP
Fit: Goodman GMT045-3 series and compatible condensers
Type: PSC motor with mounting studs
Brand: Goodman (OEM)

OEM vs. Generic

The OEM Goodman B13400251S matches the factory voltage, rotation, shaft diameter, and mounting pattern for a plug-and-play replacement and full warranty compatibility. Our generic equivalent meets the same 1/6 HP rating and voltage at a lower cost — verify rotation direction, RPM, and the required run capacitor rating before installing.

Installation Difficulty

Intermediate. Motor replacement requires disconnecting power at the disconnect, transferring the fan blade, matching the wiring and capacitor, and confirming correct rotation. No refrigerant work is required, but always verify the motor is de-energized before service and match the capacitor MFD rating to the new motor.

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 1/6 HP Condenser Fan...

$185.95

Frequently Asked Questions

Does this Condenser Fan Motor fit my Goodman GMT045-3 — B13400251S?

Yes. This is the factory-specified OEM condenser fan motor for the Goodman GMT045-3 — B13400251S. 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 condenser fan motor on my Goodman GMT045-3 — B13400251S?

Difficulty: Medium-Hard (1–2 hrs)
Step 1: Turn off breaker. Step 2: Note motor specs: HP, RPM, voltage, rotation direction. Step 3: Remove old motor from mounting. Step 4: Transfer fan blade to new motor. Step 5: Mount new motor, reconnect wiring. Step 6: Restore power, verify rotation direction.

My AC fan isn’t spinning. What part do I need?

Fan not spinning, spinning slowly, or making grinding/squealing noises = motor failure. Grinding = bearings failed. Squealing = bearings dry. No spin + hum = check the motor capacitor first before replacing the entire motor.

Is this condenser fan motor 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 condenser fan motor?

OEM recommended for reliability and warranty compatibility. OEM parts match exact factory specifications for proper fit, performance, and safety. While aftermarket alternatives cost less upfront, the risk of improper fit and reduced lifespan usually makes OEM the better value long-term.

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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