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The Goodman 10123529 Manual Reset Limit Switch is a genuine OEM safety control for the Amana/Goodman AMVM971205DNAA modulating variable-speed gas furnace. This high-limit switch opens the ignition circuit if it detects an overheat or flame-rollout condition, shutting the furnace down to protect the heat exchanger and prevent unsafe operation. The manual reset button requires an intentional press to restore operation after a trip — a deliberate safety feature that flags a fault for inspection.
The OEM 10123529 is calibrated to the exact trip temperature specified for your furnace's heat exchanger. This is a safety component — a generic switch with the wrong setpoint can either nuisance-trip or fail to protect the unit. Always use the OEM-rated part.
Moderate (3/5) — Requires removing the burner/access panel, disconnecting spade terminals, and mounting screws. Cut power and gas before servicing. If a switch has tripped, have the underlying overheat cause diagnosed by a professional.