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The Goodman 10123538 Manual Reset Limit Switch is a genuine OEM high-limit safety control for the VMES960803BNAA gas furnace and compatible Goodman/Amana models. This normally-closed thermal cutout opens the ignition circuit if it senses flame rollout or excessive heat-exchanger temperature, shutting the furnace down to prevent overheating and fire hazard. Because it is a manual reset device, it must be pressed to restore operation after a trip — a deliberate design that forces a technician to diagnose the root cause before the furnace runs again.
The OEM Goodman 10123538 is calibrated to the exact trip and reset temperatures Goodman engineered for this heat exchanger. Because this is a life-safety component, a generic switch with a different setpoint can either nuisance-trip or fail to protect against a genuine rollout. Always use the factory-matched part on safety controls.
Moderate (2/5) — Disconnect furnace power, photograph and transfer the two spade terminals, unscrew the old switch, and mount the new one in the same orientation. Basic hand tools and 10–15 minutes.
Ships fast from a US warehouse. Diagnostic questions? info@nationalhvacparts.com.