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The B1401018S is a genuine OEM Goodman hot surface ignitor (HSI), a direct-fit replacement for the GUS075-3 gas furnace. This silicon-carbide element glows red-hot to light the main burners on each heating cycle. A cracked or aged ignitor is the single most common cause of intermittent no-heat — the furnace clicks and the inducer runs, but the burners never light.
The OEM Goodman HSI comes with the correct bracket and plug so it drops straight in with no wiring modifications. Universal silicon-nitride ignitors can last longer but require adapting the connector and bracket. For a plug-and-play repair matched to the GUS075-3, OEM is the fastest, most reliable path.
Typically one mounting screw and a single plug-in connector — about 20 minutes. Never touch the silicon-carbide element with bare fingers; skin oils shorten its life. Always disconnect power before servicing.