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The Goodman 0130F00038 Auxiliary Limit Switch (Light Blue) is a genuine OEM secondary safety control for the AMH80803BNBB gas furnace and compatible Goodman/Amana models. The color-coded light-blue cap identifies its specific trip temperature — a critical detail, since Goodman uses several color/temperature variants and installing the wrong one can cause nuisance trips or unsafe operation. This auxiliary limit protects the blower compartment and heat exchanger area from over-temperature conditions caused by blower or airflow faults.
This genuine Goodman OEM limit (0130F00038) guarantees the exact light-blue trip set-point your furnace was designed around. Because this is a safety device, we strongly discourage generic substitutes with unverified temperature ratings — always match the OEM color code to the part you removed.
Easy to Moderate — 2 of 5. Remove the furnace panel, disconnect the two terminals, and unscrew the switch from its bracket. Shut off gas and power first, and confirm the replacement's color code matches the original before installing. If the switch tripped, diagnose the underlying airflow/blower issue too.