What are the specs for this Burner Orifice?

The correct replacement for Goodman model GMNT090-4B — 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 GMNT090-4B — 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.

IMAGE COMING SOON

Goodman

OEM Goodman #43 Burner Orifice for GMNT090-4B — B4089343

Name: OEM Goodman #43 Burner Orifice for GMNT090-4B — B4089343
Brand: Goodman
SKU: GOODMAN-11706
Price: 9.95 USD
Availability: InStock

SKU: GOODMAN-11706 Brand: Goodman

$9.95 $12.95

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014

SAM.gov Registered

Govt POs Accepted

Goodman B4089343 #43 Burner Orifice (Spud)

The Goodman B4089343 is a genuine OEM #43 burner orifice, also called a spud, designed for the Goodman GMNT090-4B gas furnace and compatible GMNT-series units. The orifice meters the exact volume of gas delivered to each in-shot burner, and its precision-drilled bore is matched to the furnace's BTU input and fuel type. A worn, corroded, or incorrectly sized orifice can cause under-firing, over-firing, sooting, or poor flame quality.

Specifications

Type: Burner orifice / spud
Drill size: #43
Thread: Standard Goodman burner-rail thread
Material: Machined brass
Fits: Goodman GMNT090-4B and compatible GMNT furnaces
OEM Part Number: B4089343

OEM vs. Generic

Orifice sizing is critical — a bore that is even one drill size off changes gas flow and firing rate. This OEM spud is drilled to Goodman's exact #43 specification. Generic orifices can drift in bore diameter and thread pitch, risking improper combustion. We strongly recommend OEM for any gas-metering component.

Installation Difficulty

Moderate — Requires gas shutoff, removing the burner assembly, and threading in the correct-size orifice. Confirm the drill number matches your furnace rating plate and fuel type. Professional installation recommended.

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...

$9.95

Frequently Asked Questions

Does this Burner Orifice fit my Goodman GMNT090-4B — B4089343?

Yes. This is the factory-specified OEM burner orifice for the Goodman GMNT090-4B — 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 GMNT090-4B — 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.

Menu