What are the specs for this Burner Orifice?

The correct replacement for Goodman model AMS80703AXA — 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 AMS80703AXA — 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 AMS80703AXA — B4089343

Name: OEM Goodman #43 Gas Burner Orifice for AMS80703AXA — B4089343
Brand: Goodman
SKU: GOODMAN-6895
Price: 5.95 USD
Availability: InStock

SKU: GOODMAN-6895 Brand: Goodman

$5.95 $7.99

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Goodman B4089343 #43 Natural Gas Burner Orifice

The Goodman B4089343 is a genuine OEM #43 drill-size gas burner orifice engineered for the AMS80703AXA multi-position gas furnace. The orifice meters the precise volume of natural gas delivered to each burner, ensuring a clean, stable flame and correct manifold pressure. A worn, corroded, or incorrectly sized orifice causes lazy flames, delayed ignition, sooting, or lockouts — replacing it with the exact factory-spec part restores safe, efficient combustion.

Specifications

Orifice size: #43 drill (natural gas)
Thread: standard Goodman/Amana burner manifold fit
Material: brass
Fuel type: Natural Gas
Fits: AMS80703AXA and compatible 80% AFUE furnaces

OEM vs. Generic

The OEM Goodman B4089343 is drilled and gauged to the manufacturer's exact gas-flow tolerance, so manifold pressure and BTU input stay within spec. Generic orifices vary in bore diameter and can under- or over-fire the burner, risking efficiency loss or CO production. For a gas-metering component, we strongly recommend OEM.

Install Difficulty

Moderate. Requires shutting off gas, removing the manifold, and verifying manifold pressure after replacement. Gas work should be performed by a qualified HVAC technician. Estimated time: 20–40 minutes.

Compatible with Goodman and Amana AMS80703AXA series furnaces. Verify your model and orifice number 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 Gas Burner Orifi...

$5.95

Frequently Asked Questions

Does this Burner Orifice fit my Goodman AMS80703AXA — B4089343?

Yes. This is the factory-specified OEM burner orifice for the Goodman AMS80703AXA — 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 AMS80703AXA — 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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