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The Goodman 10123535 is a genuine OEM manual-reset limit (rollout) switch with a red reset button, calibrated to a different trip temperature than its companion 10123533. It is a direct-fit replacement for the GMH950904CXAA 96% AFUE two-stage furnace. Positioned on the burner assembly, it interrupts the gas valve and ignition circuit when flame rollout or excessive heat is detected, protecting the heat exchanger and cabinet from overheating. The color coding helps technicians install the correct temperature rating in the correct location.
The OEM Goodman part guarantees the exact trip temperature and the red-button identification your service manual references. Because switch position and temperature rating are safety-critical, generic substitutes risk nuisance trips or failure to protect — always use OEM here.
Easy (2/5). Disconnect power, transfer the two wires, unscrew and remount the switch — about 10–15 minutes. Confirm you are replacing the red switch with the red switch and address the underlying cause of any trip before restarting.