What are the specs for this Burner Orifice?

The correct replacement for Goodman model AMS80904BNA — 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 AMS80904BNA — 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 Gas Burner Orifice for AMS80904BNA — B4089343

Name: OEM Goodman #43 Gas Burner Orifice for AMS80904BNA — B4089343
Brand: Goodman
SKU: GOODMAN-7064
Price: 12.95 USD
Availability: InStock

SKU: GOODMAN-7064 Brand: Goodman

$12.95 $16.95

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Goodman B4089343 Burner Orifice (#43)

The B4089343 burner orifice is a genuine OEM #43-drilled gas spud for the Goodman/Amana AMS80904BNA gas furnace. Threaded into the manifold, each orifice meters the exact volume of natural gas delivered to its in-shot burner — setting the input rate (BTU) and shaping the flame. A worn, corroded, or incorrectly-sized orifice throws off the gas/air mixture, causing lifting flames, sooting, delayed ignition, or an under-fired furnace. Using the factory-specified drill size is essential for safe, on-spec combustion.

Specifications

Type: Burner orifice / gas spud
Drill size: #43 (natural gas)
Function: Meters gas flow to in-shot burner
Material: Brass
Sold: Individually — match orifice count to your model
Fits: Goodman/Amana AMS80904BNA and related 80% furnaces
OEM Part #: B4089343

OEM vs. Generic

The OEM B4089343 is precision-drilled to the #43 size the AMS80904BNA is rated for, guaranteeing the correct BTU input and clean flame. Aftermarket orifices can vary in bore diameter and thread quality, risking over- or under-firing. Because this part directly controls the fuel rate, we strongly recommend the genuine Goodman orifice.

Installation Difficulty

Moderate (2 of 5). Unthread the old spud from the manifold and thread in the exact replacement — do not enlarge or re-drill orifices. Shut off gas and power first. Confirm orifice size matches your fuel type (natural gas vs. LP) and have a technician verify firing rate.

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 Gas Burner Orifi...

$12.95

Frequently Asked Questions

Does this Burner Orifice fit my Goodman AMS80904BNA — B4089343?

Yes. This is the factory-specified OEM burner orifice for the Goodman AMS80904BNA — 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 AMS80904BNA — 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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