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The Goodman 0130F00038 Auxiliary Limit Switch (light blue) is a genuine OEM secondary safety control for the Goodman ADVC80603BNAA furnace and compatible Goodman/Amana models. Mounted on the blower deck or burner box, this auxiliary limit provides an added layer of overheat protection, de-energizing the gas valve if temperatures exceed safe limits in the event the primary limit fails or airflow is restricted.
The OEM Goodman part guarantees the correct blue-coded calibration for this position in the furnace. Substituting a mismatched color-coded or generic switch can result in the wrong trip temperature and improper safety behavior. Because this is a life-safety device, we recommend genuine OEM.
Easy (1/5) — Snap-disc with two screws and push-on spade terminals. Disconnect furnace power first. Most homeowners complete the swap in about 15 minutes. If the switch keeps tripping, have a technician inspect airflow and the heat exchanger.