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The Goodman 10123529 Manual Reset Limit Switch is a genuine OEM safety control engineered for the Goodman/Amana ADVC81005CXBB gas furnace and compatible ADVC-series air handlers. This high-limit switch continuously monitors heat-exchanger temperature and opens the burner circuit if the furnace overheats — protecting the equipment and your home from unsafe conditions. Because it is a manual reset design, it must be physically reset with the button after a fault, which alerts homeowners that a real problem (blocked airflow, failed blower, or dirty filter) needs attention before heat resumes.
This is a genuine Goodman OEM part, calibrated to the exact trip temperature your furnace's control board expects. Generic aftermarket switches may trip at incorrect temperatures, causing nuisance shutdowns or, worse, failing to protect the unit. For a safety-critical limit switch, OEM is strongly recommended.
Easy (2/5). Two-wire connection and a single mounting bracket. A confident DIYer can swap it in 15–20 minutes with the power off. If the switch keeps tripping after replacement, have a licensed HVAC technician diagnose the underlying airflow issue.
Always disconnect power before servicing. Professional installation is recommended for gas furnace repairs.