What are the specs for this Fitting?

The correct replacement for Goodman model AMES920603BNAA — A1781105 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 AMES920603BNAA — A1781105.

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 Vinyl Cap Fitting Kit for AMES920603BNAA — A1781105

Name: OEM Goodman Vinyl Cap Fitting Kit for AMES920603BNAA — A1781105
Brand: Goodman
SKU: GOODMAN-4714
Price: 1.95 USD
Availability: InStock

SKU: GOODMAN-4714 Brand: Goodman

$1.95 $2.59

OEM Guaranteed

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30-Day Returns

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Texas CMBL #19328542014

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The Goodman A1781105 is a genuine OEM 1-piece vinyl cap for the Amana AMES920603BNAA gas furnace and compatible Goodman/Amana models. These flexible caps seal and protect unused drain ports, gas-valve fittings, and tubing connections, keeping debris out and maintaining proper airflow and pressure integrity within the furnace.

Specifications

Part Number: A1781105
Type: Vinyl protective cap (1-piece)
Material: Flexible vinyl
Function: Seals/plugs unused ports and fittings
Fits: Amana AMES920603BNAA and compatible Goodman furnaces
Equipment: Gas Furnace

OEM vs. Generic

Though inexpensive, a correctly sized cap matters — an over- or undersized generic cap can pop off or fail to seal, causing pressure-switch or condensate issues. This OEM Goodman cap matches the factory port diameter for a secure, lasting fit.

Installation Difficulty

Very Easy (1/5) — Push-on installation, no tools required. Simply seat the cap firmly over the correct port. Suitable for any DIYer.

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 Vinyl Cap Fitting Ki...

$1.95

Frequently Asked Questions

Does this Fitting fit my Goodman AMES920603BNAA — A1781105?

Yes. This is the factory-specified OEM fitting for the Goodman AMES920603BNAA — A1781105. 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 AMES920603BNAA — A1781105?

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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