What are the specs for this Burner Orifice?

The correct replacement for Goodman model GSM100-4 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 GSM100-4 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 Burner Orifice #45 for GSM100-4 Furnace — B2589345

Name: OEM Goodman Burner Orifice #45 for GSM100-4 Furnace — B2589345
Brand: Goodman
SKU: GOODMAN-B2589345
Price: 13.95 USD
Availability: InStock

SKU: GOODMAN-B2589345 Brand: Goodman

$13.95 $18.49

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The Goodman B2589345 Burner Orifice (#45) is a genuine OEM brass gas spud for GSM100-4 furnaces and compatible Goodman/Amana models. Threaded into the manifold, the orifice meters the exact volume of gas delivered to each burner, setting the furnace's rated BTU input. The #45 drill size is the factory natural-gas metering for this model.

A damaged, corroded, or incorrectly sized orifice causes lazy yellow flames, sooting, delayed ignition, or under-firing. Replacing a bad spud — or swapping the full set during service — restores clean, efficient combustion at the manufacturer's specified input.

Part type: Burner orifice / gas spud
Drill size: #45
Fuel: Natural gas
Material: Machined brass, precision-drilled
Fits: Goodman GSM100-4 and compatible Goodman & Amana furnaces
OEM Part #: B2589345

OEM vs. Generic: Orifice sizing is safety-critical — the OEM B2589345 is drilled and deburred to Goodman's exact #45 spec, guaranteeing correct input and clean flame geometry. Generic spuds vary in bore tolerance and can over- or under-fire the furnace. Always match the OEM size for gas appliances.

Install difficulty: Moderate (3/5). Turn off gas and power, remove the burner assembly, unthread the old orifice, and thread in the new spud (do not overtighten). Leak-test with soapy solution before relighting. Best performed by a qualified technician. About 30 minutes.

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 Burner Orifice #45 f...

$13.95

Frequently Asked Questions

Does this Burner Orifice fit my Goodman GSM100-4 Furnace — B2589345?

Yes. This is the factory-specified OEM burner orifice for the Goodman GSM100-4 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 GSM100-4 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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OEM Goodman Burner Orifice #45 for GSM100-4 Furnace — B2589345

Shipping Information

Return Policy

Frequently Asked Questions