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The Goodman 10123529 Manual Reset Limit Switch is a genuine OEM high-temperature safety control for Goodman and Amana AMVC80603BNCA 80% two-stage variable-speed gas furnaces. This normally-closed switch opens to shut off the gas valve if it senses excessive heat or flame rollout, protecting the furnace and home from overheating. Because it is a manual reset device, it must be physically reset after a trip — a deliberate safety feature that flags an underlying problem for inspection.
The genuine Goodman switch is calibrated to the exact trip temperature specified for this furnace, so it protects reliably without nuisance trips. Generic limits with the wrong set point either trip early (leaving you without heat) or, worse, fail to trip when they should. On a safety control, always use the OEM-spec part.
Easy to Moderate — DIY-capable. With power and gas off, remove the two mounting screws, transfer the spade terminals to the new switch, and remount. A 15-minute job with a nut driver. Important: if the switch tripped, diagnose the cause (blocked flue, dirty filter, weak blower) before returning the furnace to service.
Keep your AMVC80603BNCA furnace protected with the genuine Goodman 10123529 manual reset limit switch.