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The Goodman 0130F00038 is a genuine OEM auxiliary high-limit switch (identified by its light blue housing) used as a secondary thermal safety control on the ACVC81005CXBC two-stage gas furnace and many compatible Goodman and Amana models. This normally-closed thermal switch opens the circuit if it senses an overheat condition, shutting down the burner to protect the heat exchanger and surrounding components from heat damage.
This is a factory OEM Goodman component — the trip temperature and reset behavior are matched exactly to the furnace's safety design. Generic universal limit switches may carry a different trip rating, which can cause nuisance lockouts or, worse, fail to protect against an overheat. For a safety-critical control, OEM is strongly recommended.
Easy (1/5). Two-wire, push-on terminal connection secured by a screw or clip. Always shut off power and gas before servicing. Replacement typically takes under 10 minutes for a qualified technician.