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The Goodman 10123534 Manual Reset Limit Switch is a genuine OEM safety control for the ACVC90704CXAA 96% AFUE gas furnace and compatible Goodman/Amana models. This high-limit switch monitors heat exchanger temperature and cuts power to the gas valve if the furnace overheats — a critical safeguard against a clogged filter, blocked vent, or failed blower. Because it is a manual-reset design, it must be reset by hand after a trip, signaling that the underlying fault has been addressed.
OEM limit switches are calibrated to the exact trip temperature your furnace was designed around. A generic switch with the wrong setpoint can either nuisance-trip or, worse, fail to trip during a real overheat — a safety risk. Always use OEM for primary safety controls.
Easy (2/5) — Two mounting screws and two spade terminals. Cut power at the breaker, transfer the wires, and mount. A 10-minute job — but always diagnose why it tripped before resetting.