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The Goodman 10123517 Manual Reset Limit Switch is a genuine OEM safety control engineered for the ACVC951155DXAA gas furnace and compatible Goodman/Amana models. This high-limit/rollout switch monitors temperature at the burner and heat exchanger area, cutting power to the gas valve if it senses an unsafe overheat or flame-rollout condition. When tripped, it requires a manual press to reset — a deliberate design that forces a technician to inspect for the root cause before the furnace fires again.
This is the factory-specified OEM switch, calibrated to the exact trip temperature your furnace's safety circuit was designed around. Generic substitutes may carry a different trip point or terminal layout, which can cause nuisance lockouts or — worse — fail to trip when needed. For a life-safety component, OEM is the right call.
Easy (DIY-friendly). A two-wire spade-terminal swap that most homeowners can complete in 10–15 minutes. Always shut off gas and electrical power at the furnace before servicing. If your switch keeps tripping after replacement, have a licensed HVAC technician inspect the heat exchanger and venting.