Product Name
$0.00
✅ In Stock
🚚 Ships Today
🔒 OEM Certified
🔄 30-Day Return
Same-day dispatch if ordered by 3PM CST
Free shipping on orders $75+
Check compatibility before ordering
IMAGE COMING SOON
OEM Guaranteed
Same-Day Ship
30-Day Returns
Secure Checkout
The Goodman B4089343 Burner Orifice is a genuine OEM #43 drill-size brass orifice (spud) for the AMS80704BXA and compatible Goodman/Amana gas furnaces. The orifice threads into the manifold and meters the precise amount of gas delivered to each in-shot burner, setting the furnace's BTU input and flame characteristics.
An orifice with the wrong bore size — or one that has been enlarged by cleaning or corrosion — will over- or under-fire the furnace, producing sooty flames, poor efficiency, or nuisance safety lockouts. Matching the factory #43 drill size keeps combustion within spec.
Orifice sizing is exact and combustion-critical. Genuine OEM spuds are machined to the precise #43 bore Goodman specifies for this furnace's manifold pressure. Generic or hand-drilled orifices risk incorrect gas flow, which affects safety and efficiency. Always use the OEM-specified size.
Moderate (2/5). Shut off gas and power, remove the burner assembly to access the manifold, and thread out the old orifice with a properly sized socket or wrench — avoid deforming the brass. Install the correct #43 orifice, reassemble, and confirm a clean blue flame after relighting. Recommended for experienced DIYers or a licensed technician.