What are the specs for this Fitting?

The correct replacement for Goodman model AMES921205DNAA — 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 AMES921205DNAA — 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 1-Piece Vinyl Cap for AMES921205DNAA — A1781105

Name: OEM Goodman 1-Piece Vinyl Cap for AMES921205DNAA — A1781105
Brand: Goodman
SKU: GOODMAN-4782
Price: 1.95 USD
Availability: InStock

SKU: GOODMAN-4782 Brand: Goodman

$1.95 $2.65

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Goodman A1781105 1-Piece Vinyl Cap

The Goodman A1781105 is a genuine OEM 1-piece vinyl cap used on the Amana/Goodman AMES921205DNAA gas furnace. This small molded cap seals an unused port, protects a fitting or terminal, or plugs an access opening to keep the cabinet air- and pest-tight. Missing caps can allow air leakage and debris intrusion that affect furnace efficiency and safety.

Specifications

OEM part number: A1781105
Type: 1-piece molded vinyl cap / plug
Function: Port seal, terminal protection, or access plug
Compatible model: AMES921205DNAA and related Amana/Goodman furnaces
Sold: Each (1-piece)

OEM vs. Generic

The OEM A1781105 is molded to the precise diameter and depth of the factory opening for a snug, positive fit. Generic vinyl caps may be loose or oversized and back out over time. The genuine Goodman cap ensures a lasting seal.

Installation Difficulty

Very Easy (1 of 5). Press the cap onto the fitting or into the opening by hand. No tools required. Takes under a minute.

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 1-Piece Vinyl Cap fo...

$1.95

Frequently Asked Questions

Does this Fitting fit my Goodman AMES921205DNAA — A1781105?

Yes. This is the factory-specified OEM fitting for the Goodman AMES921205DNAA — 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 AMES921205DNAA — 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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