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The Goodman 0130F00038 is a genuine OEM auxiliary limit switch — identified by its light-blue body — for the AMVC80603BNBD gas furnace and compatible Goodman/Amana models. This secondary safety control supplements the primary limit, opening the circuit if a specific zone of the furnace (such as the blower compartment or a secondary heat-exchanger area) exceeds its safe temperature. It's a small but essential part of the furnace's layered safety system.
The color-coded OEM switch guarantees the correct trip temperature for this exact location — critical, since auxiliary limits protect against specific failure modes. A generic switch with the wrong setpoint can either nuisance-trip or fail to protect. Match the factory blue switch with OEM 0130F00038.
Easy (2/5). Two-wire disconnect and a couple of mounting screws. Cut power and gas before starting. Roughly 15 minutes; confirm the replacement is the same light-blue color code before installing.