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The Goodman 0130F00038 Auxiliary Limit Switch (light blue) is a genuine OEM thermal safety control for the ACVC800805CXAB gas furnace. The auxiliary limit monitors temperature in the blower or burner compartment and opens the control circuit if the furnace overheats — typically from restricted airflow, a dirty filter, or blower failure. The light-blue body color denotes its specific trip temperature, so matching the exact part is critical.
This OEM Goodman switch is calibrated to the precise open/close temperature your furnace requires. Using a substitute with the wrong trip point can either allow unsafe overheating or cause nuisance shutdowns. For a safety limit, always match the OEM color code and part number — generic substitutes are not recommended.
Easy — Mounts with screws and two spade terminals. Cut power, photograph the wiring, swap the switch, and reconnect. Always diagnose and correct the underlying airflow issue that caused the original to trip.
Verify the color code, model, and serial number before ordering.