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The genuine Goodman 0130F00038 Auxiliary Limit Switch (light blue) is an OEM safety control for the Goodman ACVC961005CNBA 96% AFUE gas furnace. This rollout/auxiliary high-limit opens the control circuit and shuts off the gas valve if it detects excessive temperature in the burner or blower compartment, protecting the heat exchanger and home from overheating.
Limit switches are calibrated to a specific trip temperature, which Goodman codes by color — this light-blue unit must match the original exactly. Installing a generic switch with the wrong trip point can either nuisance-trip a healthy furnace or, worse, fail to protect it. Always replace a safety control with the matching OEM part.
Easy (DIY-friendly) — Two mounting screws and two push-on terminals. Cut power at the disconnect, transfer the wires one at a time, and remount. Roughly 10–15 minutes.