What are the specs for this Burner Orifice?

The correct replacement for Goodman model GMTH070-4 — 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 GMTH070-4 — 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 GMTH070-4 — B4089343

Name: OEM Goodman #43 Burner Orifice for GMTH070-4 — B4089343
Brand: Goodman
SKU: GOODMAN-12539
Price: 5.95 USD
Availability: InStock

SKU: GOODMAN-12539 Brand: Goodman

$5.95 $7.95

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The genuine Goodman B4089343 is a #43 burner orifice (gas spud) for GMTH070-4 and compatible Goodman/Amana gas furnaces. The orifice threads into the gas manifold and meters the precise volume of gas delivered to each in-shot burner. The #43 drill-size bore sets the correct BTU input for natural gas at the rated manifold pressure — a small part that directly controls firing rate, efficiency, and safe combustion.

Specifications

OEM Part Number: B4089343
Type: Burner orifice / gas spud
Orifice size: #43 (drill size)
Fuel: Natural gas (LP conversion uses a different orifice size)
Function: Meters gas flow into each in-shot burner
Fits: Goodman GMTH070-4 and compatible furnace platforms
Brand: Goodman (OEM)

OEM vs. Generic

Orifice sizing is exact. The OEM B4089343 is precision-drilled to the #43 bore Goodman specifies for this furnace's input rating and manifold pressure. A generic or mis-sized orifice will over- or under-fire the furnace, causing poor efficiency, sooting, short cycling, or unsafe CO levels. Always match the OEM size and quantity to your burner count.

Installation Difficulty

Moderate (3/5) — Turn off gas and power, remove the burner box, unthread the old orifices from the manifold, and install the new B4089343 spuds, sealing per code. Replace as a full set. A licensed technician should verify manifold pressure, input rate, and combustion after installation.

Gas fittings must be leak-checked by a qualified professional. Verify fuel type and full model/serial before ordering.

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 GMTH070-4 — B4089343?

Yes. This is the factory-specified OEM burner orifice for the Goodman GMTH070-4 — 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 GMTH070-4 — 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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