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The genuine Goodman B1401018S Hot Surface Ignitor is the factory ignition element for the GSM080-4 gas furnace and compatible GMS/GSM 80 series models. When the thermostat calls for heat and the pressure switch proves draft, the control board energizes this ignitor; it glows white-hot to ignite the burner gas. A failed or cracked ignitor is the single most common cause of a no-heat / no-ignition furnace call.
The OEM B1401018S silicon-nitride ignitor is more rugged and longer-lived than legacy silicon-carbide styles and drops in with the exact bracket, lead length, and connector Goodman specified. Universal HSI kits require adapting the mount and splicing wires, and their glow characteristics may not match the board's timing — risking short cycling or premature failure. The OEM part restores factory ignition performance directly.
Easy (2 of 5). Shut off power, unplug the ignitor connector, remove the single mounting screw, and slide out the old element — handle the new ignitor only by its ceramic base, never the fragile glow tip. Fit the new one, secure the screw, and reconnect. About a 15-minute repair for most homeowners.