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The Goodman B1401012 Hot Surface Igniter is a genuine OEM ignition component for GMNT080-4 gas furnaces and compatible Goodman/Amana equipment. The igniter glows red-hot on a call for heat to light the main burners. A weak, cracked, or burned-out igniter is the single most common cause of no-heat furnace failures — replacing it restores reliable, on-demand ignition.
OEM igniters use the correct element resistance and mounting bracket so timing and gap match the furnace control sequence exactly. Generic silicon-nitride replacements may fit but can alter warm-up timing and are more fragile. The OEM B1401012 drops in without adapters.
Easy (2/5) — Turn off gas and power, remove the burner-compartment door, unplug the igniter connector, remove one or two mounting screws, and install the new igniter. Never touch the igniter element with bare fingers — skin oils shorten its life. About 15–20 minutes.