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The Goodman 0130F00038 is a genuine OEM auxiliary limit switch, identified by its light blue cap for quick temperature-rating recognition, and is designed for the AMEC961005CNAB gas furnace. This secondary safety control backs up the primary limit by opening the circuit if temperatures in its monitored zone exceed the rated trip point, protecting the furnace from overheating caused by airflow restriction or blower failure.
The genuine Goodman auxiliary limit is factory-calibrated to the correct trip temperature — the light blue cap matches a specific rating, so substituting a differently rated switch can defeat the safety function. Generic look-alikes may fit physically but trip at the wrong temperature. OEM ensures the correct rating and bracket fit.
Easy. Disconnect power, remove the mounting screws, transfer the spade terminals, and reinstall. No gas or brazing work. Match the color code and part number to the original before restoring power.