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The 0130F00038 is the genuine Goodman auxiliary high-limit switch, identified by its light blue cap, for the ACVC800603BXAA gas furnace and compatible Goodman/Amana units. This normally-closed thermal switch opens if it detects excessive temperature in the blower or burner area, cutting power to the gas valve to prevent overheating. The color code corresponds to the factory trip temperature, so matching the exact part is critical for correct, safe operation.
Limit switches are calibrated to a specific temperature; the light-blue OEM unit is matched to this furnace. Substituting a switch with a different trip point can either nuisance-trip on every cycle or fail to protect against a real overheat. Always replace with the identical color-coded OEM switch.
Easy (2 of 5). Two mounting screws and two spade connectors, about 15 minutes. Shut off power first. If the original switch tripped, find and correct the root cause — a dirty filter, blocked vent, or failed blower — before returning the furnace to service.