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The Goodman 0130F00038 Auxiliary Limit Switch is a genuine OEM high-limit safety control engineered for the ACES800603ANAA gas furnace and compatible Goodman/Amana models. This light-blue-coded limit switch monitors heat-exchanger and plenum temperatures, opening the circuit to shut down the burner if the unit overheats — protecting your furnace from cracked heat exchangers and unsafe operation.
This is a genuine Goodman OEM part, calibrated to the exact trip temperature specified for your furnace. Generic aftermarket switches may use approximate trip points that cause nuisance lockouts or fail to protect at the correct threshold. For a critical safety control, OEM is the recommended choice.
Easy (1/5) — Disconnect power, remove the two mounting screws and the spade connectors, and swap in the new switch. Most homeowners finish in under 15 minutes. Confirm the color code matches before installing.