What are the specs for this Coupling?

The correct replacement for Goodman model GUN125-5 — B1810400 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 GUN125-5 — B1810400.

What symptoms indicate I need a new coupling?

Common symptoms that indicate you need a new coupling include unusual noises, intermittent operation, complete failure to operate, or visible damage. For specific diagnostic guidance, visit nationalhvacparts.com/pages/hvac-diagnostic.

Is this coupling 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 Rubber Inducer Coupling for GUN125-5 — B1810400

Name: OEM Goodman Rubber Inducer Coupling for GUN125-5 — B1810400
Brand: Goodman
SKU: GOODMAN-13169
Price: 15.95 USD
Availability: InStock

SKU: GOODMAN-13169 Brand: Goodman

$15.95 $21.95

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The Goodman B1810400 Rubber Coupling is a genuine OEM flexible connector for the GUN125-5 gas furnace. This molded rubber coupling joins two sections of the vent/inducer or blower assembly, sealing the joint while absorbing vibration and allowing slight thermal movement — preventing rattles, air leaks, and stress cracking at rigid connections.

Specifications

Part Number: B1810400
Type: Flexible rubber coupling / vibration-isolating seal
Material: Heat-resistant molded rubber (EPDM-class)
Function: Seals and dampens vibration between assembly sections
Fits: Goodman GUN125-5 gas furnace
Brand: Goodman OEM replacement

OEM vs. Generic

The OEM B1810400 is molded to the exact inside diameter and durometer required for a leak-free, flexible seal on the GUN125-5. Generic rubber couplings often fit loosely or use lower-temperature compounds that harden, crack, and leak. OEM ensures a lasting, airtight, vibration-free joint.

Installation Difficulty

Easy (1/5). Slip the old coupling off, seat the new one fully on both connection points, and secure any clamps evenly. No special tools required. Cut power to the furnace before servicing.

Eliminate leaks and vibration noise with the genuine Goodman B1810400. Ready to ship today.

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 Rubber Inducer Coupl...

$15.95

Frequently Asked Questions

Does this Coupling fit my Goodman GUN125-5 — B1810400?

Yes. This is the factory-specified OEM coupling for the Goodman GUN125-5 — B1810400. 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 coupling on my Goodman GUN125-5 — B1810400?

Refer to your equipment service manual for model-specific steps. General approach: turn off power, photograph connections, remove old part, install new part, restore power and test. For gas components, hire a licensed technician. Email info@nationalhvacparts.com for guidance.

What symptoms mean I need a new coupling?

Common symptoms: unusual noises, intermittent operation, complete failure, or visible damage. Visit our diagnostic hub for symptom-based troubleshooting.

Is this coupling 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 coupling?

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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