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The Goodman 10123535 is a genuine OEM red-button manual-reset limit switch for the GMH950453BXAB furnace and compatible Goodman/Amana high-efficiency models. The red reset button distinguishes it by trip temperature from the companion 10123533 switch. It serves as a high-limit safety control, opening the burner circuit on an overheat condition and requiring a manual reset once the underlying fault (blocked airflow, failed blower, or dirty filter) is corrected.
Because the red button denotes a specific factory trip point, using the genuine OEM 10123535 guarantees the switch matches your furnace's engineered limits. Generic substitutes risk mismatched calibration and unreliable protection.
Easy (2/5) — Remove power, unplug the two spade terminals, swap the switch on its mounting bracket, and reconnect. Roughly 15 minutes for a handy homeowner.
Verify the color/part number on your existing switch before ordering — 10123533 and 10123535 are not interchangeable.