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The Goodman B1497204 is a genuine OEM thermal fusible link with a 144°C (291°F) cutoff rating for the Goodman GUN075-3 furnace. This one-time thermal safety device permanently opens the circuit if it senses an abnormal overheat condition, providing a last line of defense against fire and heat-exchanger failure. Because it is non-resettable, a blown link must be replaced — and the overheat cause corrected.
The OEM B1497204 carries the exact 144°C rating and lead configuration the GUN075-3 requires. A generic link with a higher rating could allow dangerous temperatures before opening; a lower rating causes nuisance trips. For a safety-critical device, OEM is the only correct choice.
Easy — de-energize the furnace, connect the two leads in place of the blown link, and secure per the original routing. Plan 10–20 minutes. Always identify and fix the overheating condition (airflow, heat exchanger, venting) before energizing.