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The Goodman 10123535 is a genuine OEM red-button manual reset limit / rollout safety switch for the AMS950703BXAB 96% AFUE gas furnace. The red cap identifies this switch's specific trip temperature, distinguishing it from other limits on the same furnace such as the companion 10123533. It is a normally-closed thermal cutout that opens the gas-valve circuit when it detects excessive heat from flame rollout or a blocked heat exchanger, and it must be manually reset after tripping — ensuring the underlying fault gets diagnosed before the burner relights.
The color coding matters — the red 10123535 carries a different setpoint than lookalike switches. Installing a generic or wrong-color limit can defeat the furnace's layered safety design. The genuine OEM part guarantees the correct trip point and factory-matched terminals.
Easy–Moderate (2/5). Two spade connectors and two screws. Kill power and gas, note the wire positions, and match the red switch to the same mounting location it was removed from.