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The Goodman 10123517 manual reset limit switch is a genuine OEM safety control for the Goodman ACSH960703BXAA high-efficiency gas furnace. As a manual-reset high-limit (rollout/over-temp) device, it permanently opens the control circuit when it senses an over-temperature or flame-rollout condition and stays open until physically reset — a deliberate design that forces a technician to investigate the root cause before the furnace can fire again.
This genuine Goodman OEM switch is calibrated to the exact trip temperature and uses the correct mounting and terminals for the ACSH960703BXAA. Because this is a critical flame-rollout safety device, an incorrectly rated generic part can compromise protection. OEM ensures the furnace shuts down at the right temperature and preserves your warranty.
Easy (2 of 5). Turn off power and gas, remove the mounting screws, transfer the wire leads, and install the new switch. Important: a tripped rollout switch signals a real problem (blocked flue, dirty burners, cracked heat exchanger). Have a licensed HVAC technician diagnose the cause rather than simply resetting it repeatedly.