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The Goodman 10123533 is a genuine OEM manual reset limit switch (thermal rollout / high-limit safety) built for the AMH951155DXAD gas furnace. Wired into the furnace's safety circuit, this normally-closed switch senses temperature at the burner or heat exchanger and opens if it detects overheating or flame rollout, immediately de-energizing the furnace to protect against heat exchanger damage and fire risk. Its manual reset design keeps the circuit open after a fault so the condition can be inspected before the furnace is restarted.
This switch is a specific temperature-rated variant — not interchangeable with just any rollout switch. Installing a generic part with a different setpoint or terminal layout can cause false trips or, worse, allow an unsafe overheat to go undetected. The OEM 10123533 matches the AMH951155DXAD's factory calibration and connector, keeping the furnace's safety protection intact.
Easy–Moderate (2/5) — Plan on about 15–20 minutes. Disconnect power, transfer the wire terminals one at a time to the new switch, and remount it in the original position. If the old switch had tripped, always find and correct the underlying cause — restricted airflow, dirty burners, or a compromised heat exchanger — before placing the furnace back in operation.