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The Goodman 0130F00038 is a genuine OEM auxiliary limit switch, marked with its light blue factory color code, for the VDS80603AXAA gas furnace and compatible Goodman/Amana models. This secondary thermal safety works alongside the primary high limit to guard specific zones — such as the blower compartment or a rollout path — opening the control circuit if temperatures climb beyond safe limits.
The OEM light-blue switch is calibrated to Goodman's exact auxiliary trip temperature — the color designates the setpoint, so matching it is essential. The Generic option delivers the same rating and bracket at a lower price. Because this is a safety device, OEM is preferred.
Easy (1/5) — Remove two screws and two push-on terminals, then install the replacement in the same orientation. Roughly 15 minutes. Always disconnect power first and never bypass a tripped limit switch — a repeat trip signals an airflow or heat-exchanger problem to diagnose.