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The Goodman 0130F00038 Auxiliary Limit Switch (Light Blue) is a genuine OEM safety control for the ACVM961005DXAA gas furnace and compatible Goodman and Amana units. This thermal limit guards a secondary location in the furnace cabinet — typically near the blower or coil area — and opens the control circuit if temperatures climb past its rated trip point, shutting down the burners to prevent heat-exchanger and component damage. The light-blue color code identifies its specific temperature rating so it is not confused with other limits in the unit.
The trip and reset temperatures of a limit switch are safety-critical. OEM 0130F00038 carries the exact factory rating matched to this furnace's airflow design. Generic substitutes with the wrong setpoint can either nuisance-trip or fail to protect the heat exchanger, so OEM is strongly recommended for any safety control.
Easy (1/5). Cut power, note wire positions, remove two screws, transfer the leads, and mount the new switch. Roughly a 10–15 minute repair. Verify the correct color/rating before installing.