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The Goodman 10123533 manual reset limit switch is a high-temperature safety cutout that shuts off the burners on the AMVC950704CXAA furnace when it senses overheating from restricted airflow, a failed blower, or a dirty filter. When it trips, the furnace stays locked out until the switch is manually reset, protecting the heat exchanger from thermal damage. A failed or fatigued switch causes no-heat calls or repeated shutdowns.
The genuine Goodman OEM switch is calibrated to the exact factory trip temperature for this furnace, so it protects the heat exchanger without nuisance tripping. Generic limit switches may open at the wrong setpoint, either failing to protect the unit or causing constant lockouts. OEM ensures correct safety calibration and mounting.
Easy to Moderate (~20 minutes). Disconnect power, remove the two mounting screws and spade terminals, and install the new switch in the same orientation. A multimeter helps confirm continuity. Because this is a safety component, have a licensed technician verify the root cause of any trip before returning the furnace to service.