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The genuine Goodman B4022700 In-Shot Burner is the factory 3 inch single burner used in the manifold assembly of the WFD18045S3AXCC gas furnace. In-shot burners fire gas directly into each heat-exchanger tube. When a burner rusts, clogs with debris, or develops a distorted flame, you get delayed ignition, roll-out, soot, or uneven heating. Replacing worn burners with OEM parts restores clean, even combustion.
The OEM Goodman burner matches the exact port pattern, throat diameter, and length that pair correctly with the WFD18045S3AXCC gas orifices and heat-exchanger tubes. Correct burner geometry is a combustion-safety matter — mismatched aftermarket burners can produce improper flame shape, carryover problems, or roll-out. For anything touching the gas train, use OEM.
Moderate (3 of 5). Shut off gas and power, remove the burner-box cover, unhook the burner from the manifold and slide it out of the heat-exchanger inlet, then seat the replacement in the same position. Verify proper flame carryover and crossover alignment after reinstalling. Because this is gas-side work, we recommend a licensed technician verify the flame and check for leaks. Budget 30–45 minutes.