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The Goodman 0130F00038 is a genuine OEM auxiliary limit switch, identified by its light-blue body, designed for the ACSH960904CXAA high-efficiency gas furnace. This thermal safety device opens the control circuit if temperatures in the blower or burner area exceed a safe threshold, protecting the heat exchanger and cabinet from heat damage. It is a critical safety component that helps prevent overheating caused by restricted airflow, a dirty filter, or blower failure.
The light-blue color code denotes a specific trip and reset temperature matched to the ACSH960904CXAA. Installing the genuine Goodman OEM switch guarantees the correct setpoint; a generic or wrong-color switch may trip too early (nuisance lockouts) or too late (loss of safety protection). On a life-safety component, matching the OEM spec is essential.
Easy to Moderate (2/5). Disconnect power, remove the two mounting screws, transfer the wire terminals to the new switch, and remount in the same location and orientation. Usually a 15-minute job. Verify the cause of any overheating before returning the furnace to service.