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The genuine Goodman/Amana 10123535 red manual reset limit switch is a factory high-limit safety control for the AMV90453BXBB gas furnace. The red button distinguishes it from other reset switches in the cabinet and identifies its specific trip-temperature calibration. When furnace temperature exceeds the safe threshold, the switch opens to de-energize the gas valve and must be manually reset to resume heating.
The red-button variant carries a distinct setpoint from the standard switch — using the wrong calibration causes nuisance lockouts or unsafe operation. This OEM part guarantees the correct trip point and mounting fit, protecting your warranty and combustion safety.
Easy to Moderate. Mounts with two screws and connects via spade terminals. Power off the furnace before servicing. Repeated tripping signals an airflow or heat-exchanger problem that should be diagnosed before replacement.