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The 10123529 is a genuine OEM manual-reset high-limit safety switch for the Goodman/Amana AMEC800804CNAB gas furnace. This temperature-activated safety device opens the control circuit and shuts the furnace down if it detects an overheat or flame-rollout condition, protecting the heat exchanger and home. Unlike auto-reset limits, the manual-reset design requires a technician to press the button after a trip — ensuring the underlying fault (blocked airflow, dirty filter, or rollout) is investigated before the furnace can fire again.
The OEM 10123529 is calibrated to the exact trip temperature specified for the AMEC furnace. A generic switch with the wrong set point may trip prematurely (nuisance lockouts) or, worse, fail to trip when needed. On a life-safety component, always use the factory-matched OEM part.
Easy to Moderate. Disconnect power, unplug the two wire leads, and unbolt the switch from the burner box or vestibule panel. Takes about 15–20 minutes. Never bypass a tripped limit — replace it and correct the root cause.