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The Goodman 10123517 is a genuine OEM manual reset high-limit switch engineered for the GCH90704CXAB gas furnace and compatible Goodman/Amana models. This safety control monitors heat-exchanger temperature and interrupts the burner circuit if the furnace overheats — protecting the equipment and your home from unsafe operating conditions. Because it is a manual reset device, a tripped switch requires a deliberate button press to restore operation, prompting the homeowner or technician to investigate the root cause (blocked airflow, failing blower, or dirty filter) before the furnace runs again.
The genuine OEM 10123517 is calibrated to the exact trip temperature specified for your furnace, ensuring the safety circuit responds precisely as designed. Generic substitutes may carry a different trip point or looser tolerances, risking nuisance trips or delayed shutdown. For a life-safety component, OEM is the recommended choice.
Moderate — Requires disconnecting power, removing wiring, and confirming correct orientation. Best performed by an HVAC professional. Always shut off gas and electrical power before servicing.