Same-day shipping before 3PM CST · 35,000+ OEM Parts · Texas CMBL & SAM.gov Registered · Government POs Accepted

Menu

Home Shop All Account Cart

IMAGE COMING SOON

Goodman

OEM Goodman 1-Piece Vinyl Cap for AMES920805CNAA Furnace — A1781105

SKU: GOODMAN-4749 Brand: Goodman
$1.95 $2.65

OEM Guaranteed

Same-Day Ship

30-Day Returns

Secure Checkout

Texas CMBL #19328542014
SAM.gov Registered
Govt POs Accepted

The Goodman A1781105 is a genuine OEM 1-piece vinyl cap for the AMES920805CNAA gas furnace and compatible Goodman/Amana models. This flexible push-on cap seals an unused drain, vent, or pressure-tap port on the furnace so condensate and combustion pressures route correctly. A missing or dry-rotted cap can cause air leaks, incorrect pressure-switch readings, or minor condensate weeping.

  • Genuine OEM Goodman replacement part
  • Type: 1-piece flexible vinyl cap / port plug
  • Function: Seals unused drain or pressure-tap ports
  • Material: Molded vinyl for a snug push-on fit
  • Fits: AMES920805CNAA and compatible Goodman & Amana furnaces

OEM vs. Generic: Though inexpensive, the OEM A1781105 is sized to the exact port diameter on this furnace for a reliable, air-tight seal. Generic caps of the wrong diameter can leak or pop off. At this price, OEM is the easy choice.

Install difficulty: Easy (1/5) — simply push the cap over the correct port. No tools required.

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 AMES920805CNAA Furnace — A1781105?
Yes. This is the factory-specified OEM fitting for the Goodman AMES920805CNAA 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 AMES920805CNAA 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.
Home Shop Search Account Cart
Fitment Guaranteed
MR
Mike Rivera
HVAC Parts Specialist — Online