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The Goodman 0130F00038 Auxiliary Limit Switch (light blue) is a genuine OEM high-temperature safety control for the Goodman/Amana AMH80804BNBB gas furnace. This auxiliary limit protects the furnace from overheating by cutting power to the gas valve if temperatures in a secondary location — such as the blower compartment or near the heat exchanger — exceed the safe threshold. The color-coded light blue body identifies its specific trip temperature.
The color code is load-bearing — it sets the exact trip and reset temperatures. Installing a generic switch with the wrong rating either nuisance-trips (no heat) or fails to protect against a genuine overheat condition. This OEM switch guarantees the correct light-blue temperature rating and factory bracket fit.
Easy. Disconnect power, unplug the two spade terminals, remove the mounting screws, and install the replacement. Always match the color/temperature rating exactly — never substitute a different color. A 10-15 minute repair for a handy homeowner, though a technician can confirm the underlying cause of a tripped limit.
Restore safe operation to your AMH80804BNBB with the genuine Goodman 0130F00038 auxiliary limit switch.