What are the specs for this Burner Orifice?

The correct replacement for Goodman model GMT090-5B 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 GMT090-5B 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.

IMAGE COMING SOON

Goodman

OEM Goodman #43 Burner Orifice for GMT090-5B Furnace — B4089343

Name: OEM Goodman #43 Burner Orifice for GMT090-5B Furnace — B4089343
Brand: Goodman
SKU: GOODMAN-12418
Price: 5.95 USD
Availability: InStock

SKU: GOODMAN-12418 Brand: Goodman

$5.95 $7.95

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014

SAM.gov Registered

Govt POs Accepted

The Goodman B4089343 #43 Burner Orifice (gas spud) is a genuine OEM replacement for the Goodman GMT090-5B gas furnace. The orifice is the precision-drilled brass jet threaded into the manifold that meters the exact gas flow into each in-shot burner. The #43 drill-size bore sets the correct BTU input for this furnace on natural gas — even a slightly wrong orifice throws off firing rate and flame quality.

Specifications

Type: Manifold burner orifice / gas spud
Orifice size: #43 drill size
Fuel: Natural gas (verify against furnace rating plate)
Material: Machined brass
Fits: Goodman GMT090-5B and compatible Goodman/Amana furnaces

OEM vs. Generic

The OEM B4089343 is bored and deburred to Goodman's tolerance so the gas stream entrains the correct primary air for a clean flame at rated input. Generic spuds may have inconsistent bore diameters or thread pitch, causing over/under-firing, sooting, or leaks. Since the orifice directly controls combustion input, always match the size on the rating plate and use OEM.

Installation Difficulty

Easy (2/5) — Shut off gas and power. Remove the burner assembly, back the old orifice out of the manifold with the correct wrench, thread in the matching #43 spud snugly (do not overtighten brass), and leak-test with soap solution after restart. About 15–20 minutes. If unsure about gas work, use a licensed HVAC 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...

$5.95

Frequently Asked Questions

Does this Burner Orifice fit my Goodman GMT090-5B Furnace — B4089343?

Yes. This is the factory-specified OEM burner orifice for the Goodman GMT090-5B 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 GMT090-5B 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.

Menu