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The Goodman 10123533 is a genuine OEM manual-reset high-limit / rollout switch for the AMVC951155DXAA two-stage variable-speed furnace and compatible Goodman/Amana models. This normally-closed thermal safety opens and cuts power to the gas valve if it detects an overheat or flame-rollout condition, protecting the heat exchanger and cabinet. Because it is a manual-reset device, it stays open after a trip until the red button is pressed — a deliberate design so a technician inspects the root cause before the furnace can restart.
Trip temperature and mounting bracket are matched to the furnace's factory specification. A generic switch with a different set point can trip prematurely (nuisance no-heat) or too late (a genuine safety risk). This is a safety component — we recommend genuine OEM only.
Cut power at the disconnect, pull the two spade connectors, remove the mounting screws, and install the replacement. Under 10 minutes. Always determine why the original tripped before returning the unit to service.