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The Goodman 10123538 is a genuine OEM manual-reset limit (flame rollout) switch that protects your furnace by opening the ignition circuit if it detects abnormal heat or flame rollout at the burner box. It is a direct replacement for the AMSS960803BNAA and compatible Goodman/Amana 96% AFUE gas furnaces. Because it is manual-reset, it stays open until an operator presses the reset button — a deliberate safety feature that flags a fault needing inspection.
OEM rollout switches are calibrated to the furnace's exact trip temperature. Generic switches with the wrong setpoint can nuisance-trip or, worse, fail to protect the equipment. Use the authentic Goodman part to preserve factory safety limits.
Easy–Moderate (2/5) — disconnect power, unplug the two spade terminals, swap the switch on its bracket, and reconnect. 10–15 minutes for a DIY-capable owner; a multimeter helps confirm continuity.