What are the specs for this Burner Orifice?

The correct replacement for Goodman model GMT070-4B — 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 GMT070-4B — 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 GMT070-4B — B4089343

Name: OEM Goodman #43 Burner Orifice for GMT070-4B — B4089343
Brand: Goodman
SKU: GOODMAN-12344
Price: 5.95 USD
Availability: InStock

SKU: GOODMAN-12344 Brand: Goodman

$5.95 $7.95

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The Goodman B4089343 Burner Orifice is a genuine OEM #43 drill-size gas spud for GMT070-4B furnaces and compatible Goodman/Amana models. The orifice is the precision-machined metering jet that threads into the manifold and sets the exact gas flow into each in-shot burner. Bore size is critical: the #43 orifice is calibrated to deliver the correct BTU input for this furnace's rating on natural gas. A damaged, corroded, or wrong-size orifice causes under- or over-firing, sooting, and poor efficiency.

Part number: B4089343
Orifice size: #43 (drill number)
Function: Gas metering jet / burner spud
Gas type: Natural gas (verify against your rating plate)
Fits: Goodman GMT070-4B and compatible furnaces
Type: Genuine OEM Goodman replacement

OEM vs. Generic: Orifice sizing is not interchangeable — a bore even one drill number off changes the firing rate and combustion quality. The OEM B4089343 guarantees the correct #43 bore and thread pitch for your manifold. We do not recommend generic or re-drilled orifices for gas metering. Always confirm the required size on your furnace's rating plate.

Install difficulty: Easy (2/5). Shut off gas supply, unthread the old orifice from the manifold with the proper deep socket, and hand-thread the new spud in snugly — do not overtighten. Leak-check all connections with soap solution before firing. Gas work should be performed by a qualified technician where code requires.

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 GMT070-4B — B4089343?

Yes. This is the factory-specified OEM burner orifice for the Goodman GMT070-4B — 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 GMT070-4B — 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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OEM Goodman #43 Burner Orifice for GMT070-4B — B4089343

Shipping Information

Return Policy

Frequently Asked Questions