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The Goodman 0130F00038 Auxiliary Limit Switch (light-blue body) is a genuine OEM secondary thermal safety for the Amana/Goodman AMVC960803BNBA gas furnace. This auxiliary limit provides overheat protection for a specific zone of the furnace — such as the blower compartment or a secondary section of the heat exchanger — opening the control circuit if temperatures exceed its rated set point. The blue color code identifies its trip temperature, so matching the exact part is essential.
The OEM Goodman switch guarantees the correct trip temperature indicated by the blue code. Installing a differently-rated generic limit can defeat the furnace's layered safety design. As a safety device, the OEM part is strongly recommended.
Easy — DIY-friendly. One or two mounting screws and two spade terminals. Disconnect power first and confirm you are replacing it with the same blue-coded temperature rating.