What are the specs for this Burner Orifice?

The correct replacement for Goodman model GMT140-5A — 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 GMT140-5A — 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 Natural Gas Burner Orifice for GMT140-5A — B4089343

Name: OEM Goodman #43 Natural Gas Burner Orifice for GMT140-5A — B4089343
Brand: Goodman
SKU: GOODMAN-12474
Price: 8.95 USD
Availability: InStock

SKU: GOODMAN-12474 Brand: Goodman

$8.95 $11.95

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The Goodman B4089343 Burner Orifice #43 is a genuine OEM brass metering spud drilled to a number 43 (0.089") bore for the Goodman GMT140-5A natural gas furnace. This orifice regulates gas flow into each in-shot burner so the furnace fires at its rated input with a clean, stable flame and correct combustion.

Specifications

Part Type: Natural gas burner orifice (spud)
OEM Part Number: B4089343
Drill Size: #43 (approx. 0.089" bore)
Fuel Type: Natural gas
Material: Machined brass, standard pipe thread
Compatibility: Goodman GMT140-5A (140K BTU) burner assembly

OEM vs. Generic

The #43 bore is precisely sized to Goodman's manifold pressure and BTU derating for the GMT140-5A. Using an incorrectly sized or generic orifice changes the fuel rate, risking sooting, under-firing, or nuisance lockouts. A factory-matched B4089343 guarantees the burner fires exactly as engineered.

Installation Difficulty

Moderate (3/5). Shut off the gas supply, access the manifold, and replace the orifice with a correctly sized socket. Apply approved thread sealant sparingly and leak-check with soap solution after reassembly. Gas work should be completed or verified by a licensed HVAC professional.

Confirm your orifice drill size against your unit's rating plate before ordering, or reach us at info@nationalhvacparts.com for fitment help.

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 Natural Gas Burn...

$8.95

Frequently Asked Questions

Does this Burner Orifice fit my Goodman GMT140-5A — B4089343?

Yes. This is the factory-specified OEM burner orifice for the Goodman GMT140-5A — 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 GMT140-5A — 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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