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The Goodman 10123533 is a genuine OEM manual reset high-limit switch built for the GMV91155DXBA 115,000 BTU high-efficiency gas furnace. This safety control monitors heat-exchanger temperature and trips the furnace off if it overheats — typically from restricted airflow, a dirty filter, or blower failure. Unlike auto-reset limits, the manual reset design requires a technician to physically reset it after a fault, ensuring the underlying problem is diagnosed before the furnace restarts.
Limit switches must be matched to the furnace's exact trip temperature and mounting location. An incorrect generic switch with the wrong setpoint can either nuisance-trip or, worse, fail to protect the heat exchanger. Genuine OEM 10123533 guarantees the factory-specified cutout temperature and fit for safe operation.
A straightforward swap for technicians and experienced DIYers. Disconnect power, remove the two spade terminals and mounting screws, install the new switch in the same orientation, and reconnect. Diagnose and clear the overheating cause before returning the furnace to service.