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Keep your Goodman GKS91155DXAB furnace operating safely with the genuine OEM 10123533 manual reset limit switch. This thermal safety control opens the gas valve circuit when it senses an over-temperature condition in the heat exchanger or burner area, preventing dangerous overheating from restricted airflow, a failed blower, or a dirty filter. As a manual reset component, it locks out after a trip so the fault can be investigated before the furnace is returned to service.
The genuine OEM 10123533 is factory-calibrated to the exact trip and reset points specified for the GKS91155DXAB. Generic substitutes often carry different temperature ratings that can cause premature lockouts or inadequate protection. For a life-safety control, we recommend the OEM part for correct, reliable performance.
Easy (2/5) — Disconnect power and gas first. Remove the two spade connectors and mounting screw, swap the switch, and reconnect. Always determine why a limit tripped before resetting. If the cause isn't obvious, consult a licensed HVAC technician.