What are the specs for this Burner Orifice?

The correct replacement for Goodman model GMT045-3B Furnace — 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 GMT045-3B Furnace — 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 GMT045-3B Furnace — B4089343

Name: OEM Goodman #43 Burner Orifice for GMT045-3B Furnace — B4089343
Brand: Goodman
SKU: GOODMAN-12285
Price: 5.95 USD
Availability: InStock

SKU: GOODMAN-12285 Brand: Goodman

$5.95 $7.95

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Goodman B4089343 #43 Burner Orifice

The Goodman B4089343 is a genuine OEM #43 burner orifice (spud) engineered for the Goodman GMT045-3B gas furnace and compatible multi-position models. This precision-drilled brass orifice meters the exact volume of gas delivered to each burner, ensuring a clean, efficient blue flame and safe combustion. A worn, corroded, or incorrectly sized orifice causes lazy yellow flames, sooting, delayed ignition, and reduced heating output — replacing it restores rated BTU performance.

Part Number: B4089343
Orifice Size: #43 drill
Material: Machined brass
Fits: Goodman GMT045-3B and compatible furnaces
Fuel: Natural gas (verify for LP conversions)
Thread: Standard Goodman burner manifold

OEM vs. Generic

The genuine OEM B4089343 is drilled to Goodman's exact specification and pressure-tested for correct gas metering. Generic orifices are often off by a drill size or two, which throws off the gas/air mixture and can trip flame-sensor faults. For a combustion component, we recommend OEM to keep your furnace within safe, factory-rated tolerances.

Installation Difficulty

Easy (1/5). A qualified HVAC technician can swap the orifice in minutes with a nut driver after shutting off the gas supply. Always verify manifold pressure after installation.

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 GMT045-3B Furnace — B4089343?

Yes. This is the factory-specified OEM burner orifice for the Goodman GMT045-3B Furnace — 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 GMT045-3B Furnace — 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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