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The Goodman 0130F00038 is a genuine OEM auxiliary limit switch — identified by its light-blue body color code — for the Amana / Goodman AMH80904BXCB furnace. This manual-reset thermal safety monitors a secondary location such as the blower deck or burner box and cuts the ignition circuit if abnormal heat is detected, guarding against overheating and flame rollout conditions.
The color code corresponds to a specific factory trip temperature. Installing the wrong rating is a safety hazard, so matching the OEM light-blue part is essential. Generic switches may not carry the correct calibration or the same reset style.
Easy (2/5). Two screws and two spade terminals; power off before servicing. If this switch has tripped, always diagnose the root cause (blocked venting, dirty burners, cracked heat exchanger) before resetting or replacing — a licensed technician should verify safe operation.