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The Goodman B4022700 3-inch In-Shot Burner is a genuine OEM steel burner designed for the VMS80604BNAA gas furnace. In-shot burners deliver a precisely shaped gas-air flame into each heat exchanger tube, providing quiet, reliable ignition and efficient heat transfer. Over time, burners can corrode, clog, or distort, causing rough ignition, delayed light-off, or uneven heating — replacing them restores clean, consistent combustion.
OEM vs. Generic: Genuine Goodman burners are matched to the furnace's manifold pressure, orifice size, and heat exchanger geometry for correct flame shape and length. Generic burners may misalign the flame, causing flame impingement, sooting, or nuisance flame-sensor lockouts. Replace all burners as a set for even performance.
Installation Difficulty: Moderate (3/5). Requires removing the burner assembly and aligning the burner to the heat exchanger inlet. Shut off gas and power first. Professional installation is recommended if you are unfamiliar with burner alignment.
National HVAC Parts carries genuine Goodman burners with expert support at info@nationalhvacparts.com.