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The Goodman 0130F00038 is a genuine OEM auxiliary limit switch (identified by its light blue body) for the ACVM960604CXAA gas furnace and compatible Goodman/Amana models. This thermal safety device opens the control circuit if blower compartment or heat exchanger temperatures exceed a safe threshold — protecting against overheating from a dirty filter, blocked return, or failed blower motor.
Limit switches are calibrated to a specific trip temperature. The genuine Goodman OEM switch is matched to this furnace's design, so it trips exactly when intended. A generic switch with the wrong setpoint can nuisance-trip or, worse, fail to protect the heat exchanger. Always match the OEM color code and part number.
Easy (2/5). Cut power at the breaker, remove the two mounting screws, transfer the spade wires, and mount the new switch. About 15 minutes. Confirm the trip temperature stamp matches the original.