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Goodman

OEM Goodman Vinyl Cap Fitting for AMEC960603ANAA Furnace — A1781105

SKU: GOODMAN-4128 Brand: Goodman
$4.95 $6.95

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Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

The Goodman A1781105 is a genuine OEM one-piece vinyl cap fitting used on the Amana/Goodman AMEC960603ANAA gas furnace. These small vinyl caps seal unused pressure-switch ports, tubing tees, and manifold taps so the furnace maintains the correct pressure references and no air leaks develop in the sensing circuit. Though inexpensive, a missing or brittle cap can cause pressure-switch faults that are frustrating to diagnose.

  • Part number: A1781105
  • Type: One-piece molded vinyl cap / plug
  • Function: Seals unused ports and tubing connections
  • Fits: AMEC960603ANAA and a wide range of Amana/Goodman furnaces
  • Category: Furnace fitting / hardware

OEM vs. Generic: The OEM A1781105 is sized to the exact port diameter for an airtight friction fit. Substitute caps that are slightly loose can leak and undermine pressure-switch operation, so matching the original is worth the small cost.

Install difficulty: Very easy (1/5). Simply press the cap onto the port or tubing stub — no tools required. Inspect adjacent caps while you are in the unit and replace any that have hardened or cracked.

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

Frequently Asked Questions

Does this Fitting fit my Goodman AMEC960603ANAA Furnace — A1781105?
Yes. This is the factory-specified OEM fitting for the Goodman AMEC960603ANAA 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 AMEC960603ANAA 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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Mike Rivera
HVAC Parts Specialist — Online