What are the specs for this Cap?

The correct replacement for Goodman model AMSS921005CNAA 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 AMSS921005CNAA Furnace — A1781105.

What symptoms indicate I need a new cap?

Common symptoms that indicate you need a new cap include unusual noises, intermittent operation, complete failure to operate, or visible damage. For specific diagnostic guidance, visit nationalhvacparts.com/pages/hvac-diagnostic.

Is this cap 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 for AMSS921005CNAA Furnace — A1781105

Name: OEM Goodman Vinyl Cap for AMSS921005CNAA Furnace — A1781105
Brand: Goodman
SKU: GOODMAN-7492
Price: 1.95 USD
Availability: InStock

SKU: GOODMAN-7492 Brand: Goodman

$1.95 $2.59

OEM Guaranteed

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Texas CMBL #19328542014

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The Goodman A1781105 1-Piece Vinyl Cap is a genuine OEM component for the AMSS921005CNAA gas furnace and compatible Goodman/Amana models. This molded vinyl cap seals off unused ports, drain openings, or terminal points to keep out dust, moisture, and insects while maintaining the furnace's intended airflow and pressure characteristics.

Specifications

OEM Part Number: A1781105
Type: 1-piece vinyl protective cap
Fits: AMSS921005CNAA and compatible Goodman/Amana furnaces
Material: Flexible molded vinyl
Function: Port / opening seal and protection

OEM vs. Generic

This genuine OEM cap matches the exact port diameter and depth of your furnace, ensuring a snug, secure seal that won't pop off during operation. Generic caps are often loose or oversized and can fall away with vibration and heat cycling, leaving openings exposed. The OEM part guarantees a proper fit the first time.

Install Difficulty

Very Easy (1 of 5). No tools required — simply push the cap onto the target port until fully seated. A one-minute job for any DIY owner.

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 for AMSS92...

$1.95

Frequently Asked Questions

Does this Cap fit my Goodman AMSS921005CNAA Furnace — A1781105?

Yes. This is the factory-specified OEM cap for the Goodman AMSS921005CNAA 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 cap on my Goodman AMSS921005CNAA 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 cap?

Common symptoms: unusual noises, intermittent operation, complete failure, or visible damage. Visit our diagnostic hub for symptom-based troubleshooting.

Is this cap 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 cap?

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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