What are the specs for this Burner Orifice?

The correct replacement for Goodman model GSU100-4 Furnace — B2589345 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 GSU100-4 Furnace — B2589345.

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 #45 Burner Orifice for GSU100-4 Furnace — B2589345

Name: OEM Goodman #45 Burner Orifice for GSU100-4 Furnace — B2589345
Brand: Goodman
SKU: GOODMAN-B2589345
Price: 13.95 USD
Availability: InStock

SKU: GOODMAN-B2589345 Brand: Goodman

$13.95 $18.95

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OEM Goodman B2589345 Burner Orifice (#45 Drill Size)

The Goodman B2589345 is a precision-machined natural gas burner orifice (spud) sized to drill #45, designed for the Goodman GSU100-4 gas furnace. The orifice meters the exact volume of gas delivered to each burner, setting the furnace's BTU input and combustion quality. A worn, corroded, or incorrectly sized orifice causes poor flame, delayed ignition, sooting, or reduced heat output. Replacing it with the correct OEM orifice restores clean, efficient combustion and correct manifold pressure.

Specifications

Part number: B2589345
Orifice drill size: #45
Fits: Goodman GSU100-4 gas furnace
Fuel: Natural gas
Thread: Standard Goodman burner spud thread
Material: Machined brass

OEM vs. Generic

Orifice sizing is critical to safe combustion. The OEM B2589345 guarantees the #45 bore Goodman specified for this furnace's BTU rating and altitude tuning. Generic orifices may have inconsistent bore tolerances that alter the gas rate — always verify size before installing.

Installation Difficulty

Easy to Moderate — basic hand tools. Requires shutting off gas, removing the manifold or burner assembly, and threading the new orifice in. Estimated time: 15–30 minutes per orifice. After installation, verify manifold pressure and flame appearance. Shut off gas and power before servicing.

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 #45 Burner Orifice f...

$13.95

Frequently Asked Questions

Does this Burner Orifice fit my Goodman GSU100-4 Furnace — B2589345?

Yes. This is the factory-specified OEM burner orifice for the Goodman GSU100-4 Furnace — B2589345. 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 GSU100-4 Furnace — B2589345?

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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