What are the specs for this Fitting?

The correct replacement for Goodman model AMES920804CNAA — 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 AMES920804CNAA — 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 Caps for AMES920804CNAA — A1781105

Name: OEM Goodman 1-Piece Vinyl Caps for AMES920804CNAA — A1781105
Brand: Goodman
SKU: GOODMAN-4737
Price: 1.95 USD
Availability: InStock

SKU: GOODMAN-4737 Brand: Goodman

$1.95 $2.59

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014

SAM.gov Registered

Govt POs Accepted

The Goodman A1781105 1-Piece Vinyl Caps are genuine OEM fittings used on the AMES920804CNAA gas furnace and related Goodman/Amana equipment. These vinyl caps seal off unused ports, cover exposed terminals or openings, and protect fittings from dust and moisture intrusion. Though small, missing or degraded caps can allow air leaks, debris entry, or exposed connection points inside the furnace cabinet.

Specifications

OEM Part Number: A1781105
Compatible Model: AMES920804CNAA
Category: Fitting / Hardware
Configuration: 1-piece vinyl cap
Material: Flexible vinyl
Fit: Direct OEM replacement

OEM vs. Generic

The genuine OEM A1781105 is sized to the exact port diameter used on Goodman and Amana furnaces, providing a snug, secure fit that generic rubber or vinyl plugs cannot reliably match. Ill-fitting universal caps can fall off during operation or fail to fully seal. For the correct fit and finish, use the OEM cap.

Installation Difficulty

Very Easy — DIY. Installation is push-on and requires no tools — simply press the cap onto the intended port or terminal. Ideal as a low-cost maintenance item to keep on hand.

Genuine Goodman OEM quality at a budget-friendly price. Ships fast from stock.

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 Caps f...

$1.95

Frequently Asked Questions

Does this Fitting fit my Goodman AMES920804CNAA — A1781105?

Yes. This is the factory-specified OEM fitting for the Goodman AMES920804CNAA — 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 AMES920804CNAA — 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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