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The Goodman B2589343 natural gas burner orifice is the OEM metering jet for the GDT090-4 gas furnace. Each orifice is precision-drilled to release a specific gas volume into its burner for clean, efficient combustion. A worn, enlarged, or clogged orifice causes sooting, uneven flames, or reduced heat output.
Our OEM B2589343 is drilled to the exact factory orifice size for the GDT090-4 heat exchanger and BTU rating. An incorrect drill size — common with generic or mismatched orifices — over- or under-fires the burner and can produce dangerous carbon monoxide. Fuel-metering parts are one place where OEM is not optional.
Easy (2/5). Around 15–30 minutes for a full set. Shut off gas and power, remove the burner box or manifold, and thread the new orifice into place with the correct wrench — do not overtighten. Leak-test with soap solution after reassembly.
Confirm the orifice size for your exact model, serial, and fuel type before ordering. Natural gas and LP orifices are not interchangeable.