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The 0130F00038 is a genuine Goodman OEM auxiliary limit switch, marked by its light blue color code, and is a direct-fit replacement for the VDS80603ANAA gas furnace. As a secondary safety, the auxiliary limit adds a redundant high-temperature cutout — commonly guarding the blower compartment or a secondary airflow zone — so the burner de-energizes if temperatures exceed safe limits due to a blocked filter, failed blower, or restricted duct.
Because the auxiliary limit is a backstop safety device, matching the OEM trip temperature is essential. The genuine Goodman part is factory-calibrated to the VDS80603ANAA specification. Generic substitutes may trip at the wrong temperature, causing either nuisance shutdowns or, worse, failing to protect the furnace. Always confirm the light blue code before ordering.
Easy — A straightforward two-screw, two-terminal swap. Cut power to the furnace, transfer the wires one at a time, secure the switch to its bracket, and restore power. No calibration needed.
Do not substitute this auxiliary limit for the primary (pink 0130F00036) — the two are calibrated differently and are not interchangeable.