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The Goodman 10123535 is a genuine OEM red-cap manual reset limit switch engineered for the GMV950453BXBB furnace and related Goodman/Amana gas furnace platforms. The red housing typically denotes a distinct temperature calibration or mounting location from its companion limit switches, so match the exact part number to your unit. This safety control interrupts the gas valve circuit on an overheat event and must be manually reset, ensuring intermittent overheating conditions get investigated rather than ignored.
The OEM 10123535 guarantees the factory trip temperature and correct terminal orientation for a plug-and-play swap. A generic alternative can reduce cost, but verify the temperature rating and lead style match — safety limit controls are not the place to guess.
Easy (2/5). Disconnect power and gas, transfer the spade connectors, and secure with the mounting screw. Clear any airflow restriction that caused the original trip before returning the furnace to service.