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The Goodman 0130F00038 Auxiliary Limit Switch (Light Blue) is a genuine OEM safety control for the ADSH801005CXAB gas furnace and compatible Goodman/Amana models. This secondary thermal cutout guards a specific zone of the furnace — such as the blower compartment or burner area — and opens the control circuit if temperatures exceed safe limits. The light-blue body color identifies its factory trip-temperature rating, so matching the exact part is essential.
This genuine OEM Goodman part (0130F00038) is calibrated to the precise set point indicated by its light-blue coding. Installing a switch with the wrong trip temperature — a common mistake with generic substitutes — can cause nuisance shutdowns or bypass a critical safety limit. For any auto-reset safety device, always match the OEM color/rating.
Easy — Typically two screws and two spade terminals. Disconnect power, verify you are matching the light-blue rating, and seat the switch flush to its mounting surface. A quick 10–15 minute swap for most homeowners.
Always disconnect electrical power before servicing. Confirm the replacement matches the light-blue temperature rating.