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The Goodman B4022700 3-inch in-shot burner is a genuine OEM component engineered for the WGFM28070V4BXAB gas furnace and compatible Goodman/Amana modular furnace platforms. Each in-shot burner mixes gas and air and directs a stable, high-efficiency flame into the heat exchanger tube. A furnace uses one burner per heat-exchanger cell, so replacing a rusted, sooted, or flame-rollout-damaged burner restores clean combustion and even heat output.
This is a factory-original Goodman burner. Unlike universal generic burners, the OEM B4022700 is dimensioned to seat precisely against the manifold orifice and heat-exchanger inlet, preserving the designed air-fuel ratio and flame position. Generic burners can shift flame carryover timing and cause delayed ignition or rollout. For furnaces still in service, the OEM part protects your heat exchanger warranty and combustion safety margins.
Rated Easy for a qualified technician. Shut off gas and power, remove the burner box cover and manifold, slide the old burner off its locating tab, and install the replacement in the same orientation. Verify flame appearance and carryover after restart. Because this involves a gas appliance, installation should be performed by a licensed HVAC professional in accordance with local codes.