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The Goodman 10123535 Manual Reset Limit Switch (red) is a genuine OEM thermal safety cutout for the AMH950905DXAA gas furnace and compatible Goodman/Amana models. The red color code denotes a distinct trip-temperature calibration from the companion 10123533; installing the correct color-coded switch is essential to proper furnace protection. When an over-temperature or flame-rollout event occurs, the switch latches open and must be manually reset after the fault is corrected.
The OEM 10123535 guarantees the exact factory trip point tied to its red color code — something generic universal limits cannot reliably match. Since this switch guards against heat-exchanger failure and flame rollout, a mismatched rating is a genuine safety risk. Always replace with the OEM, color-correct part.
Easy (2/5) — Two screws and quick-connect terminals. Cut power before servicing and always identify why the limit tripped before resetting or replacing.