What are the specs for this Fitting?

The correct replacement for Goodman model ACVC90905DXAA 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 ACVC90905DXAA 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 1-Piece Vinyl Caps for ACVC90905DXAA Furnace — A1781105

Name: OEM Goodman 1-Piece Vinyl Caps for ACVC90905DXAA Furnace — A1781105
Brand: Goodman
SKU: GOODMAN-2701
Price: 6.95 USD
Availability: InStock

SKU: GOODMAN-2701 Brand: Goodman

$6.95 $9.38

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Goodman A1781105 1-Piece Vinyl Caps

The Goodman A1781105 is a genuine OEM 1-piece vinyl cap designed for the ACVC90905DXAA furnace and compatible Goodman/Amana models. These caps seal off unused tubing ports, pressure taps, and gas-train fittings to keep out dust, debris, and condensate, and to maintain correct draft and pressure-switch readings. They also serve as protective covers during shipping, storage, and service.

Specifications

OEM Part Number: A1781105
Part Type: 1-Piece Vinyl Cap / Plug
Compatible Model: ACVC90905DXAA (90% AFUE furnace)
Brand: Goodman (also fits select Amana units)
Material: Flexible heat-tolerant vinyl
Application: Port, tap, and fitting sealing / protection

OEM vs. Generic

Genuine OEM A1781105 caps are molded to the precise port diameter and durometer Goodman specifies, providing a snug, lasting seal. Generic vinyl caps often fit loosely or harden and crack near warm furnace components, allowing air infiltration that can skew pressure-switch operation. OEM ensures a reliable seal at a minimal cost.

Installation Difficulty

Easy (1/5) — No tools required. Push the cap firmly onto the port or fitting until seated. Installs in seconds.

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...

$6.95

Frequently Asked Questions

Does this Fitting fit my Goodman ACVC90905DXAA Furnace — A1781105?

Yes. This is the factory-specified OEM fitting for the Goodman ACVC90905DXAA 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 ACVC90905DXAA 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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