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The Goodman 10123533 is a genuine OEM manual reset high-limit safety switch designed for the GKS90704CXAB gas furnace and compatible Goodman/Amana models. This switch protects your furnace by cutting power to the gas valve if the heat exchanger area exceeds its safe operating temperature — a common cause of no-heat lockouts and short cycling. Because it is a manual reset device, it must be physically reset after a trip, alerting the homeowner or technician that an overheat or airflow condition occurred.
Genuine OEM switches like the 10123533 are calibrated to Goodman's exact trip temperature, ensuring proper safety response and preserving equipment warranties. Aftermarket generics may use different trip points or terminal spacing, risking nuisance trips or improper protection. For a critical safety component, OEM is strongly recommended.
Easy (1 of 5) — Requires disconnecting power, unplugging two spade terminals, and swapping a single bolt-on switch. Typical time: 10–15 minutes. Always shut off electrical power and gas before servicing.