IMAGE COMING SOON
OEM Guaranteed
Same-Day Ship
30-Day Returns
Secure Checkout
The Goodman 10123529 is a manual reset high-temperature limit switch engineered for the GDH80403ANBD 80% AFUE single-stage gas furnace and compatible Goodman/Amana models. This safety control opens the ignition circuit if the heat exchanger or plenum exceeds its rated cut-out temperature, shutting down the burners to prevent overheating. Unlike an auto-reset limit, this switch stays open until manually reset by pressing the button — a deliberate design that forces a technician to diagnose the root cause (blocked airflow, dirty filter, failed blower) before the furnace can run again.
The OEM 10123529 is calibrated to the exact trip temperature Goodman engineered for this heat exchanger and mounts with the correct bracket geometry. Generic universal limits require matching trip point and terminal orientation and may void warranty coverage. For a safety-critical control, we recommend the genuine OEM part.
Easy (2/5). Two mounting screws and two spade terminals. Always shut off gas and power at the disconnect before servicing. If the limit has tripped, correct the underlying airflow problem before resetting.