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The genuine Goodman 0130F00038 auxiliary limit switch is a direct-fit replacement for the ADVC80603BXAA gas furnace. This secondary thermal safety opens the control circuit if abnormal heat builds up in its monitored zone — for example, restricted airflow or a blower fault — shutting the furnace down before damage occurs. The light blue color code marks its distinct factory trip temperature, which differs from the primary pink limit.
The OEM 0130F00038 is set to Goodman's precise auxiliary trip point. Because this switch and the primary pink limit look similar but trip at different temperatures, using the correct light-blue OEM part is essential — a substitution can defeat the safety logic or cause false lockouts.
Easy (1/5). Two screws, two spade terminals. Power off, match the light-blue color code, transfer the wires, and reinstall. Roughly 10–15 minutes.