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The Goodman 20261709S Hot Surface Ignitor (HSI) is a genuine OEM part designed for the GMPE100-4A gas furnace. The hot surface ignitor is the component that glows red-hot to light the burners on each heating cycle. A failed or cracked ignitor is the single most common cause of a furnace that clicks but won't fire — replacing it restores dependable, on-demand ignition.
The genuine OEM 20261709S arrives with the correct bracket, wire length, and plug so it drops directly into the burner assembly. Universal ignitor kits require you to match resistance, splice wires, and fabricate a mount — increasing the risk of a short-lived repair or a no-heat callback. OEM ensures correct ignition timing and long service life.
Moderate. Expect 20–30 minutes. Shut off gas and power, unplug the ignitor connector, remove the mounting screw, and install the new unit — handle only by the ceramic base, never the fragile element, as skin oils and finger pressure crack the fragile tip. Cycle the furnace to confirm a clean, immediate light. If you're not comfortable working near the gas valve, hire a licensed technician.