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The Goodman 0130F00038 Auxiliary Limit Switch (Light Blue) is a genuine OEM secondary safety cutout for the Amana/Goodman AMH80604BXBD gas furnace. This auxiliary limit provides backup overheat/rollout protection, opening the gas-valve circuit if temperatures in its zone exceed the safe threshold. The light-blue body identifies its specific trip temperature — using the correctly rated switch is essential for safe operation.
The genuine OEM switch matches the factory trip temperature (indicated by the light-blue color code) and terminal layout for a true drop-in replacement. Installing a switch with the wrong rating defeats the safety function or causes nuisance trips. For a safety device, always match the OEM color/temperature spec.
Easy — typically two mounting screws and two spade terminals. Cut power at the breaker first and confirm the replacement's color code matches the original before wiring. If temperatures still trip after replacement, investigate the underlying airflow or venting cause.