What are the specs for this Fitting?

The correct replacement for Goodman model GSM100-4 Furnace — B1392139 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 — B1392139.

What symptoms indicate I need a new fitting?

Common symptoms that indicate you need a new fitting include unusual noises, intermittent operation, complete failure to operate, or visible damage. For specific diagnostic guidance, visit nationalhvacparts.com/pages/hvac-diagnostic.

Is this fitting 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 View Port Bushing for GSM100-4 Furnace — B1392139

Name: OEM Goodman View Port Bushing for GSM100-4 Furnace — B1392139
Brand: Goodman
SKU: GOODMAN-B1392139
Price: 4.95 USD
Availability: InStock

SKU: GOODMAN-B1392139 Brand: Goodman

$4.95 $6.49

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Texas CMBL #19328542014

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The Goodman B1392139 View Port Bushing is a genuine OEM sealing grommet for the flame-inspection sight port on GSM100-4 gas furnaces and compatible Goodman/Amana models. This small but essential fitting holds the view-port glass in place and creates an airtight seal, letting a technician watch the burner flame during startup without allowing flue gases or combustion air to leak from the vestibule panel.

Over years of heat cycling the original bushing can harden, crack, or fall out, which shows up as nuisance flame-sensor faults, pressure-switch trips, or a whistling draft around the inspection window. Replacing it with the correct OEM part restores a proper combustion seal.

Part type: View port / sight-glass bushing (grommet)
Material: High-temperature molded rubber/silicone
Fits: Goodman GSM100-4 and compatible Goodman & Amana furnaces
Function: Seals and retains the burner-observation port glass
OEM Part #: B1392139

OEM vs. Generic: The OEM bushing is molded to the exact port diameter and rated for the vestibule temperatures Goodman specifies, so it seats fully and holds its seal. Generic grommets are cheaper but frequently oversize or under-rated, leading to a loose fit or premature hardening. For a reliable combustion seal we recommend the OEM part.

Install difficulty: Easy (1/5). Cut power and gas, pop out the old bushing, press the new one into the port, and reinstall the glass. Typically a 5-minute job with no tools required.

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 View Port Bushing fo...

$4.95

Frequently Asked Questions

Does this Fitting fit my Goodman GSM100-4 Furnace — B1392139?

Yes. This is the factory-specified OEM fitting for the Goodman GSM100-4 Furnace — B1392139. 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 fitting on my Goodman GSM100-4 Furnace — B1392139?

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 fitting?

Common symptoms: unusual noises, intermittent operation, complete failure, or visible damage. Visit our diagnostic hub for symptom-based troubleshooting.

Is this fitting 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 fitting?

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 View Port Bushing for GSM100-4 Furnace — B1392139

Shipping Information

Return Policy

Frequently Asked Questions