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The Goodman B4022700 3-inch In-Shot Burner is a genuine OEM replacement engineered for the GMV81155CXA and compatible GMV8-series 80% AFUE gas furnaces. The in-shot burner delivers a precisely shaped flame into the heat exchanger tube, which is critical for clean combustion, quiet ignition, and efficient heat transfer throughout the heating season.
Over time, in-shot burners can corrode, warp, or accumulate rust and scale that disrupt the flame pattern — causing delayed ignition, rollout, or a rumbling burner. Replacing worn burners with the correct OEM part restores a crisp blue flame and safe, reliable operation.
Our OEM Goodman burner is built to the exact orifice alignment and flame-carryover spacing the GMV8 heat exchanger was designed around, ensuring correct light-off and no rollout. Generic aftermarket burners are more affordable but may vary slightly in port geometry, which can cause uneven flame or ignition delay. For a furnace burner assembly, we recommend the OEM part for safety-critical fit.
Moderate. Burners are typically replaced as a matched set; installation requires removing the burner assembly, transferring the crossover igniter, and verifying flame sensing. Always shut off gas and power first. Professional installation by a licensed HVAC technician is recommended.
Backed by our fit guarantee. Not sure it fits your unit? Contact info@nationalhvacparts.com with your model and serial number.