What are the specs for this Burner Orifice?

The correct replacement for Goodman model GMT115-5B — B4089343 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 GMT115-5B — B4089343.

What symptoms indicate I need a new burner orifice?

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

Is this burner orifice 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 #43 Burner Orifice for GMT115-5B — B4089343

Name: OEM Goodman #43 Burner Orifice for GMT115-5B — B4089343
Brand: Goodman
SKU: GOODMAN-12448
Price: 5.95 USD
Availability: InStock

SKU: GOODMAN-12448 Brand: Goodman

$5.95 $7.95

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Goodman B4089343 #43 Burner Orifice (Spud)

The Goodman B4089343 is a genuine OEM burner orifice — a precision-drilled brass gas spud sized at #43 drill — for the GMT115-5B furnace. The orifice meters the exact volume of natural gas into each in-shot burner, setting the furnace's BTU input and flame quality. Using the wrong orifice size causes over- or under-firing, sooting, poor flame, or nuisance limit trips. Damaged, corroded, or debris-clogged orifices should be replaced to restore proper firing rate.

Specifications

Type: Threaded burner orifice / gas spud
Drill Size: #43
Material: Machined brass
Gas Type: Natural gas (verify against your rating plate)
Sold as: Individual orifice (order one per burner)
Fits: Goodman GMT115-5B and compatible furnaces
OEM Part Number: B4089343
Brand: Goodman (genuine OEM)

OEM vs. Generic

Genuine Goodman orifices are drilled to a certified tolerance and threaded to seal correctly in the manifold. Generic orifices may vary in bore size or thread pitch, throwing off the firing rate and risking gas leaks. For a component that governs combustion input, always use the exact OEM part and drill size specified for your unit.

Install Difficulty

Easy (2/5). Shut off the gas, remove the burner, and thread the orifice into the manifold; leak-check the joint afterward. Roughly 10–20 minutes. Confirm the #43 size matches your furnace rating plate and gas type before installing.

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 #43 Burner Orifice f...

$5.95

Frequently Asked Questions

Does this Burner Orifice fit my Goodman GMT115-5B — B4089343?

Yes. This is the factory-specified OEM burner orifice for the Goodman GMT115-5B — B4089343. 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 burner orifice on my Goodman GMT115-5B — B4089343?

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 burner orifice?

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

Is this burner orifice 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 burner orifice?

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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