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The Goodman 10123535 is a factory-original red-button manual-reset high-limit switch for the GMH950704CXAE 95% AFUE furnace. The red button distinguishes it from the companion limit at a different trip point, so ordering the correct color avoids mixing up setpoints. It breaks the control circuit on an over-temperature or flame-rollout event and holds the furnace off until manually reset, protecting the heat exchanger and preventing unsafe repeat cycling.
The color and part number encode a specific trip temperature. Substituting a generic or the wrong-color switch risks nuisance lockouts or inadequate protection. This OEM 10123535 is calibrated exactly for its position in the GMH950704CXAE.
Rating: Easy (1 of 5). Two mounting screws and two spade terminals. Kill power first and confirm the underlying overheat cause is resolved before restarting.