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The genuine Goodman 0130F00038 Auxiliary Limit Switch (light-blue identification) is the factory thermal safety control for the Goodman/Amana ACVC960403BNBA 96% AFUE variable-speed gas furnace. This auxiliary high-limit monitors temperature in the blower or burner compartment and opens the circuit if the furnace overheats — protecting the heat exchanger and cabinet from heat damage when airflow is restricted by a dirty filter or blocked duct.
The color band on this switch identifies its exact trip and reset temperature — using the wrong rating is a safety hazard. The OEM 0130F00038 guarantees the correct light-blue temperature calibration the engineering spec calls for, where generic limits frequently ship with the wrong setpoint or footprint and either nuisance-trip or fail to protect.
Easy (1/5) — Disconnect power, remove two mounting screws, transfer the wire leads to the new switch, and remount. A 10–15 minute job with a nut driver. Always confirm the cause of any overheat (airflow, filter) before replacing a tripped limit.