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The Goodman 0130F00038 is the OEM auxiliary limit switch — identifiable by its light-blue body — for the Amana/Goodman AMH80904BXCC 80% AFUE gas furnace. This secondary high-limit control provides backup overheat and flame-rollout protection, opening the safety circuit if temperatures in its monitored zone exceed the factory trip point. It works alongside the primary limit to prevent unsafe furnace operation.
Goodman color-codes these auxiliary limits by trip temperature, and the light-blue 0130F00038 is calibrated to the exact spec for this furnace. Installing a generic disc — or the wrong color code — risks either nuisance trips or, worse, a limit that won't open when it should. Always match OEM for auxiliary safety controls.
Easy (2/5) — Disconnect power, unplug the spade terminals, remove the mounting screws, and install the replacement in the same orientation. About 15 minutes.