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The B1497204 is a genuine Goodman 144°C fusible link, a one-time thermal safety fuse used in GUE120-5 gas furnaces. Wired in series with the control circuit, the link opens permanently if furnace temperatures exceed its 144°C (291°F) rating — protecting the equipment and home from overheating caused by restricted airflow, a failed blower, or a stuck limit. When a fusible link blows, the furnace goes dead until it is replaced, so keeping a genuine OEM link on hand restores safe operation quickly.
Because this is a life-safety component, the exact trip temperature matters. The genuine Goodman B1497204 is rated precisely at 144°C to match the furnace's design limits. A generic link with a different rating can trip too early (nuisance shutdowns) or too late (unsafe). Always use the OEM-spec 144°C link.
Easy (2/5) — Disconnect power, unplug the failed link from its wiring harness, and snap in the replacement. Under 15 minutes. Note: a blown link indicates an underlying overheat condition — diagnose and correct the root cause (airflow, blower, or limit) before returning the furnace to service.