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The Goodman 0130F00038 is a genuine OEM auxiliary (secondary) limit switch — identified by its light-blue housing — designed for the Amana/Goodman AMVM971205DNAA variable-speed gas furnace. This backup thermal safety senses temperature in a secondary location such as the blower compartment or return air, providing redundant overheat protection beyond the primary high limit. When it trips or fails, the furnace can lock out or short-cycle; installing the correct OEM auxiliary switch restores full safety-circuit function.
The blue auxiliary switch and pink primary switch use different trip temperatures and are not interchangeable — a key reason to buy the exact OEM part. Generic substitutes rarely match the auxiliary calibration and can cause false lockouts or bypass needed protection. Choose this genuine Goodman switch for correct, code-compliant operation.
Easy (1 of 5). Held by two screws and quick-connect terminals; a 10–15 minute swap with a nut driver. De-energize the furnace and shut off gas before servicing. When in doubt, call a licensed HVAC professional.