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The Goodman 0130F00038 Auxiliary Limit Switch is a genuine OEM safety control engineered for the Goodman ACSS961005CNAA gas furnace and compatible models in the same family. This light-blue, color-coded auxiliary limit monitors heat-exchanger and blower-compartment temperatures, opening the control circuit if the unit overheats to protect the furnace and your home. Color coding identifies the factory trip temperature, so installing the correct OEM switch is critical for safe, reliable operation.
This is a genuine Goodman OEM part calibrated to the exact trip temperature your furnace's control logic expects. Generic limit switches may carry a different reset point or tolerance, which can cause nuisance lockouts or, worse, fail to trip when needed. For a safety component, OEM is strongly recommended.
Easy (2/5) — Typically two screws and a pair of spade connectors. Always shut off power and gas before servicing. If you are not comfortable verifying limit operation, consult a licensed HVAC technician.