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The Goodman 20261709S is a hot surface ignitor (HSI) for the GMP150-5 gas furnace. When the thermostat calls for heat, the control board energizes this ignitor until it glows red-hot, lighting the burners. A cracked or worn-out ignitor is the single most common cause of no-heat / no-ignition failures. This durable, drop-in element restores dependable startups.
The OEM ignitor provides factory resistance values, bracket alignment, and connector match for maximum lifespan. The generic silicon-nitride/carbide equivalent fits the same mount and delivers reliable ignition at a lower cost.
Moderate (2/5). Cut power, unplug the connector, remove one or two mounting screws, and set the new ignitor without touching the element (skin oils shorten life). Allow ~20–30 minutes.