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The Goodman 10123519 Manual Reset Limit Switch is a high-temperature safety cutout for the GME951005DXAB gas furnace. It monitors heat-exchanger and cabinet temperature, opening the burner circuit if the furnace overheats due to restricted airflow, a dirty filter, or a blower failure. Because it is a manual-reset device, it requires a deliberate button press to restore operation — a built-in prompt for the homeowner or tech to find and fix the root cause.
This genuine Goodman switch is calibrated to the exact trip temperature engineered for the GME951005DX heat exchanger. Aftermarket switches with the wrong setpoint can nuisance-trip or, worse, fail to protect the unit. OEM guarantees the correct cutout and mounting footprint.
Moderate (2/5). Disconnect power, remove the two mounting screws and spade connectors, and swap in the new switch. Verify tight terminals and correct orientation before restoring power.