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The Goodman 10123533 is a genuine manual reset limit switch for the AMEC960302BNAC 96% AFUE gas furnace and compatible Goodman/Amana models. This is a safety high-limit / rollout control: if the furnace overheats or experiences flame rollout, the switch opens and shuts down the burner to prevent damage and hazard. Unlike an auto-reset limit, a manual reset device stays open until a technician presses the reset button — by design, so the underlying fault (blocked flue, failed blower, dirty filter) is investigated before the furnace runs again.
Note: refer to the switch body or your furnace service label for the exact trip temperature rating before substituting.
A safety limit switch is not the place to save a few dollars. Generic limits may carry the wrong trip temperature or terminal orientation, which can cause nuisance trips or, worse, fail to protect the heat exchanger. The OEM 10123533 is calibrated to this furnace's specification for reliable, code-correct protection.
Moderate (3/5). Requires shutting off power and gas, removing the burner-compartment door, transferring the two spade wires, and mounting the switch to the original bracket. Straightforward for an HVAC technician; homeowners should confirm the fault is cleared before resetting.
Always de-energize before servicing safety controls. Fitment questions: info@nationalhvacparts.com.