What are the specs for this Fitting?

The correct replacement for Goodman model GMT070-4 — 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 GMT070-4 — 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 GMT070-4 — B1392139

Name: OEM Goodman View Port Bushing for GMT070-4 — B1392139
Brand: Goodman
SKU: GOODMAN-12329
Price: 0.85 USD
Availability: InStock

SKU: GOODMAN-12329 Brand: Goodman

$0.85 $1.15

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The Goodman B1392139 View Port Bushing is a genuine OEM sight-port grommet that fits the burner-observation opening on the GMT070-4 gas furnace and many related Goodman/Amana models. This small bushing seals the viewing port on the burner compartment so a technician can watch the flame while keeping the combustion area properly closed. A cracked, brittle, or missing bushing can allow an air leak at the port and is inexpensive insurance to replace during routine service.

Specifications

Type: view/sight port bushing (grommet)
Location: burner compartment observation port
Function: seals and frames the flame-viewing opening
Material: high-temperature molded bushing
Fits: Goodman GMT070-4 furnace
OEM Part Number: B1392139

OEM vs. Generic

This is a molded fit-specific part sized to the exact port diameter on the furnace panel. Because it's an inexpensive genuine component, there is little reason to source a generic substitute that may not seat correctly or hold up to burner-area heat. The OEM bushing simply snaps in and seals.

Install Difficulty

Very Easy. Press the old bushing out and snap the new one into the port — under 5 minutes, no tools required. Disconnect power before opening the burner compartment.

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...

$0.85

Frequently Asked Questions

Does this Fitting fit my Goodman GMT070-4 — B1392139?

Yes. This is the factory-specified OEM fitting for the Goodman GMT070-4 — 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 GMT070-4 — 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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