What are the specs for this Burner Orifice?

The correct replacement for Goodman model GMNT090-3B — 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 GMNT090-3B — 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 GMNT090-3B — B4089343

Name: OEM Goodman #43 Burner Orifice for GMNT090-3B — B4089343
Brand: Goodman
SKU: GOODMAN-11698
Price: 5.95 USD
Availability: InStock

SKU: GOODMAN-11698 Brand: Goodman

$5.95 $7.95

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The Goodman B4089343 Burner Orifice is a genuine OEM #43-drilled gas spud for the GMNT090-3B furnace. The orifice meters the exact gas flow into each in-shot burner, setting the furnace's BTU input. Using the correct drill size is critical — an incorrect orifice changes firing rate and can cause sooting, poor efficiency, or overheating.

Specifications

Type: Burner orifice / gas spud
Drill size: #43
Fuel: Natural gas (verify against your rating plate)
Sold: Individually (one per burner)
Fits: Goodman GMNT090-3B and compatible furnaces specifying a #43 orifice
OEM Part Number: B4089343

OEM vs. Generic

Gas metering leaves no room for error. The OEM B4089343 is precision-drilled and gauged to the furnace's rated input. Generic orifices can vary in bore diameter and thread pitch, altering BTU output and combustion quality. For any gas-metering component, the exact OEM orifice is the safe, code-correct choice.

Install Difficulty

Easy (1/5). A 5–10 minute task per orifice: shut off gas, remove the manifold or unscrew the spud, thread in the new orifice, and check for leaks with soap solution after restoring gas. Requires a nut driver or wrench. Confirm the drill number stamped on your existing orifice matches #43 before installing.

Safety note: Never substitute an LP orifice on a natural-gas unit (or vice versa). Match fuel type and drill size exactly.

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 GMNT090-3B — B4089343?

Yes. This is the factory-specified OEM burner orifice for the Goodman GMNT090-3B — 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 GMNT090-3B — 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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