What are the specs for this Fitting?

The correct replacement for Goodman model AMES920403ANAA Furnace — 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 AMES920403ANAA Furnace — 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 for AMES920403ANAA Furnace — A1781105

Name: OEM Goodman Vinyl Cap Fitting for AMES920403ANAA Furnace — A1781105
Brand: Goodman
SKU: GOODMAN-4705
Price: 1.95 USD
Availability: InStock

SKU: GOODMAN-4705 Brand: Goodman

$1.95 $2.55

OEM Guaranteed

Same-Day Ship

30-Day Returns

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Texas CMBL #19328542014

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Govt POs Accepted

The Goodman A1781105 Vinyl Cap is a genuine OEM protective fitting designed for the AMES920403ANAA gas furnace and other compatible Goodman/Amana equipment. These vinyl caps seal open ports, protect exposed terminals, and prevent debris intrusion during service and normal operation. Using the factory-specified part ensures a snug, correct fit that generic caps often fail to deliver.

Specifications

OEM Part Number: A1781105
Type: 1-piece vinyl protective cap
Material: Flexible molded vinyl
Compatible Model: AMES920403ANAA (Amana/Goodman furnace)
Equipment: Gas Furnace

OEM vs. Generic

Our OEM A1781105 matches factory tolerances exactly, so it will not slip off or crack under heat cycling. Generic universal caps are lower cost but may not seat correctly on Goodman ports, leading to premature failure or exposure. For a small-dollar part like this, the OEM option is the safe, hassle-free choice.

Install Difficulty

Easy (1/5) — No tools required. Simply push the cap onto the appropriate port or terminal. Always disconnect power before servicing your furnace.

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 fo...

$1.95

Frequently Asked Questions

Does this Fitting fit my Goodman AMES920403ANAA Furnace — A1781105?

Yes. This is the factory-specified OEM fitting for the Goodman AMES920403ANAA Furnace — 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 AMES920403ANAA Furnace — 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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