What are the specs for this Burner Orifice?

The correct replacement for Goodman model AMS80905CNA Furnace — 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 AMS80905CNA Furnace — 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 AMS80905CNA Furnace — B4089343

Name: OEM Goodman #43 Burner Orifice for AMS80905CNA Furnace — B4089343
Brand: Goodman
SKU: GOODMAN-7103
Price: 12.95 USD
Availability: InStock

SKU: GOODMAN-7103 Brand: Goodman

$12.95 $16.95

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Goodman B4089343 #43 Burner Orifice

The Goodman B4089343 Burner Orifice is a genuine OEM #43 drill-size gas orifice (spud) for the AMS80905CNA furnace and compatible Goodman and Amana models. The orifice threads into the manifold and meters the precise volume of gas fired into each in-shot burner — the single most important factor in achieving correct BTU input and clean combustion. A worn, corroded, or incorrectly sized orifice causes lazy flames, sooting, or under-firing; installing the factory-spec orifice restores rated output.

Specifications

OEM Part Number: B4089343
Part Type: Burner orifice / gas spud
Drill Size: #43
Fuel: Natural gas
Material: Machined brass
Compatibility: Goodman / Amana AMS80905CNA and related furnaces
Sold as: Single orifice (match quantity to burner count)

OEM vs. Generic

Orifice sizing is exact — a fraction of a millimeter changes the BTU input and gas/air ratio. This OEM #43 orifice is drilled to Goodman's specification for correct manifold pressure and firing rate. Generic or mismatched orifices risk over/under-firing, sooting, and even unsafe combustion. Always match OEM.

Installation Difficulty

Moderate. About 15–30 minutes for a full set. Requires shutting off gas, removing the manifold, and swapping orifices with a nut driver. Recommend a combustion/manifold-pressure verification afterward — best confirmed by a technician.

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...

$12.95

Frequently Asked Questions

Does this Burner Orifice fit my Goodman AMS80905CNA Furnace — B4089343?

Yes. This is the factory-specified OEM burner orifice for the Goodman AMS80905CNA Furnace — 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 AMS80905CNA Furnace — 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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