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The Goodman 10123529 Manual Reset Limit Switch is a genuine OEM high-temperature safety control for the Goodman ADVC81005CNAA gas furnace. This normally-closed switch opens the ignition circuit and shuts down the furnace if it detects an over-temperature or flame-rollout condition. Because it is a manual-reset device, it must be pressed to restore operation after a trip — a deliberate safety feature that flags a real problem worth investigating.
The OEM Goodman switch is calibrated to the exact trip temperature specified for this furnace. Generic limit switches with a different set point can nuisance-trip or, worse, fail to trip when needed. On a life-safety control, genuine OEM calibration is not optional — always use the correct part.
Easy to Moderate. About 20–30 minutes. Shut off power and gas, disconnect the two spade terminals, remove the mounting screws, and install the new switch. Confirm the furnace no longer trips under normal operation. If it re-trips, have a technician diagnose the underlying cause.