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The Goodman B1401012 Hot Surface Igniter is a genuine OEM ignition component for GDT045-3A gas furnaces and compatible Goodman/Amana equipment. When the thermostat calls for heat, this igniter glows red-hot to light the burners. A cracked or worn igniter is the single most common cause of a no-heat furnace — replacing it restores reliable startup.
This OEM Goodman igniter includes the correct plug and mounting bracket for a true plug-and-play fit, and is matched to your control board's timing and resistance. Generic universal igniters require splicing and can crack under the wrong voltage profile. OEM means longer life and zero wiring guesswork.
Moderate (2/5) — Shut off power and gas. Unplug the igniter connector, remove one or two mounting screws, and install the new unit. Never touch the ceramic element with bare fingers — skin oils cause hot spots and early failure. Handle by the ceramic base or bracket only.