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The Goodman 20165703S Hot Surface Ignitor is a genuine OEM replacement part engineered for the Goodman WFD18115S5CXCB gas furnace and compatible models. When your furnace runs the inducer and gas valve but never lights, a cracked or worn ignitor is the most common cause. This direct-fit silicon nitride ignitor restores reliable, fast ignition without the fragility of older silicon carbide designs.
Our OEM 20165703S ignitor is manufactured to Goodman's exact resistance and bracket spec for guaranteed alignment in the burner assembly and consistent ignition timing. Generic universal ignitors often require adapter brackets, may not match the furnace's ignition control timing, and typically fail sooner. For a furnace you rely on through winter, the factory part is the confident choice.
Easy — 2 out of 5. Most homeowners can swap this ignitor in 15–20 minutes with a nut driver. Always disconnect power at the furnace switch and breaker before servicing, and handle the ceramic element only by its bracket — skin oils shorten ignitor life. If you're unsure about gas appliance service, consult a licensed HVAC technician.
Backed by our fit guarantee. Questions about compatibility? Contact info@nationalhvacparts.com before ordering.