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The Goodman 0130F00038 Auxiliary Limit Switch (light-blue rated) is a genuine OEM thermal safety control for the AMVC81005CXBA gas furnace. This normally-closed limit monitors temperature at a critical location and opens the control circuit if it senses overheating — shutting off the burners to prevent heat-exchanger damage or a fire hazard. A tripped or failed auxiliary limit is a common cause of intermittent no-heat and safety lockouts.
The color code is the trip temperature — installing the wrong rating defeats the safety function. Genuine OEM 0130F00038 guarantees the exact light-blue set point, bracket, and terminal orientation. Generic look-alikes risk nuisance trips or, worse, failing to open at the correct temperature. Always match OEM for safety controls.
Shut off power and gas, disconnect the two spade terminals, remove the mounting screws, and install the exact-match replacement. If the original tripped, investigate the underlying cause (dirty filter, blocked airflow, blower fault) before returning the unit to service.
Exact-fit OEM safety part with fast shipping.