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The Goodman 10123529 is a genuine OEM manual reset high-limit switch for AMVC80803BXCA gas furnaces and compatible Goodman/Amana models. This safety control monitors temperature and opens the circuit if the furnace overheats — often due to restricted airflow or a failing blower — shutting down the burners to protect the heat exchanger. A manual reset design requires a deliberate button press to restore operation, ensuring the underlying fault is addressed before the furnace can restart.
OEM limit switches are calibrated to the exact trip temperature specified for your furnace. Generic substitutes with the wrong trip point can nuisance-trip during normal operation or, worse, fail to open when they should — a genuine safety risk. On a protective control, always use the OEM-matched part.
Easy to Moderate — Turn off power, disconnect the two spade terminals, unscrew the bracket, and reverse for the new switch. A basic multimeter check for continuity confirms correct installation. Root-cause any overheat condition (dirty filter, blocked returns) before restarting.
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